This application is a continuation of PCT/CN2020/137963, filed Dec. 21, 2020; which claims the benefit of U.S. Provisional Application No. 62/953,744, filed Dec. 26, 2019. The contents of the above-identified applications are incorporated herein by reference in their entireties.

›FIELD OF INVENTION

The present invention relates to several crystalline forms of (S)-1-(1-acryloylpyrrolidin-3-yl)-3-((3,5-dimethoxyphenyl)ethynyl)-5-(methylamino)-1H-pyrazole-4-carboxamide.

›BACKGROUND OF THE INVENTION

(S)-1-(1-acryloylpyrrolidin-3-yl)-3-((3,5-dimethoxyphenyl)ethynyl)-5-(methylamino)-1H-pyrazole-4-carboxamide (Compound I) is a potent inhibitor of fibroblast growth factor receptor (FGFR). The preparation of Compound I and its use in the treatment of cancers are described in WO2018/049781, which is incorporated herein by reference in its entirety.

›BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows an X-ray powder diffraction (XRPD) diagram of Form A.

FIG. 2 shows a differential scanning calorimeter (DSC) diagram of Form A.

FIG. 3 shows a thermogravimetric analysis (TGA) diagram of Form A.

FIG. 4 shows an XRPD diagram of Form B.

FIG. 5 shows an XRPD diagram of Form C.

FIG. 6 shows a DSC diagram of Form C.

FIG. 7 shows a TGA diagram of Form C.

FIG. 8 shows the overlay of XRPD diagrams of Form A before (below) and after (above) stored at 80° C. for one day.

FIG. 9 shows the overlay of XRPD diagrams of Form A before (below) and after (above) stored under 25° C./60% RH for one week.

FIG. 10 shows the overlay of XRPD diagrams of Form A before (below) and after (above) stored under 40° C./75% RH for one week.

FIG. 11 shows a dynamic vapor sorption (DVS) diagram of Form A.

FIG. 12 shows the overlay of XRPD diagrams of Form A before (below) and after (above) DVS testing.

FIG. 13 shows the overlay of XRPD diagrams of Form C before (below) and after (above) stored under 25° C./60% RH for one week.

FIG. 14 shows the overlay of XRPD diagrams of Form C before (below) and after (above) stored under 40° C./75% RH for one week.

FIG. 15 shows a DVS diagram of Form C.

FIG. 16 shows the overlay of XRPD diagrams of Form C before (below) and after (above) DVS testing.

FIG. 17 shows interconversion of Forms A-C.

›DETAILED DESCRIPTION OF THE INVENTION

The present invention provides several crystalline forms of (S)-1-(1-acryloylpyrrolidin-3-yl)-3-((3,5-dimethoxyphenyl)ethynyl)-5-(methylamino)-1H-pyrazole-4-carboxamide (Compound I) and the processes for their preparations. The crystalline forms of Compound I are suitable for pharmaceutical research and for preparing a pharmaceutical formulation.

Crystalline Form A

The crystalline form A of Compound I can be prepared by crystallizing the starting material Compound I from a solvent mixture of acetone and water. The synthesis of the starting material Compound I is as described in WO2018/049781.

The XRPD diagram of Form A is shown in FIG. 1 , having characteristic peaks at 2theta values of 22.1°±0.2°, 17.4°±0.2°, 28.3°±0.2°.

Furthermore, the XRPD of Form A further shows one or more characteristic peaks at 2theta values of 17.8°±0.2°, 14.0°±0.2°, 11.0°±0.2°.

Furthermore, the XRPD of Form A further shows one or more characteristic peaks at 2theta values of 24.1°±0.2°, 24.9°±0.2°, 6.7°±0.2°.

The XRPD data of Form A is shown in Table 1.

Form A of Compound I is an anhydride.

Form A of Compound I shows an endothermic peak at 178° C. (the peak temperature) when heated in a DSC. The DSC diagram is shown in FIG. 2 .

Form A of Compound I shows about 0.02% weight loss when heated to 180° C. in a thermogravimetric analyzer. The TGA diagram is shown in FIG. 3 . TGA is a method of thermal analysis in which the mass of a sample is measured over time as the temperature changes. TGA evaluates the thermal stability of a material. FIG. 3 shows that Form A is thermally stable, with negligible mass change when heated to 180° C.

Form A is stable after storage at 80° C. (closed) for one day, and 25° C./60% RH and 40° C./75% RH (opened) for one week, without changing the characteristic peaks in the XRPD diagram.

Form A of Compound I has a solubility of 6.4 μg/mL after equilibrium in water at room temperature for 24 hours which is classified as almost insoluble or insoluble.

Form A shows a water uptake of 0.14% at 80% RH and is not hygroscopic.

Crystalline Form B

The crystalline form B of Compound I can be prepared by firstly converting Form A into an amorphous form, followed by different preparation methods, such as gas-liquid permeation, volatilization and crystallization.

The XRPD diagram of Form B is shown in FIG. 4 , having characteristic peaks at 2theta values of 9.0°±0.2°, 12.4°±0.2°, 19.3°±0.2°.

Furthermore, the XRPD of Form B further shows one or more characteristic peaks at 2theta values of 15.3°±0.2°, 11.5°±0.2°, 10.0°±0.2°.

Furthermore, the XRPD of Form B further shows one or more characteristic peaks at 2theta values of 6.1°±0.2°, 16.2°±0.2°, 3.8°±0.2°.

The XRPD data of Form B is shown in Table 2.

Form B is chemically stable. Form B is not physically stable and it can be converted to Form A or Form C.

Form B has an equilibrium solubility of 15.14 μg/mL, about 2.42% weight loss by TGA, and three endothermic peaks at 70° C., 101° C., 174° C. by DSC.

Form B of Compound I is a hydrate.

Crystalline Form C

The crystalline Form C of Compound I can be prepared from Form B, for example, by heating.

The XRPD diagram of Form C is shown in FIG. 5 , having characteristic peaks at 2theta values of 12.7°±0.2°, 16.4°±0.2°, 8.7°±0.2°.

Furthermore, the XRPD of Form C further shows one or more characteristic peaks at 2theta values of 9.3°±0.2°, 19.3°±0.2°, 24.8°±0.2°.

Furthermore, the XRPD of Form C further shows one or more characteristic peaks at 2theta values of 17.5°±0.2°, 5.8°±0.2°, 15.7°±0.2°.

The XRPD data of Form C is shown in Table 3.

Form C of Compound I is a hydrate.

Form C of Compound I shows two endothermic peaks at 104° C. and 178° C. (the peak temperatures) when heated in a differential scanning calorimeter. The DSC diagram is shown in FIG. 6 .

Form C of Compound I shows about 2.40% weight loss when heated to 180° C. in a thermogravimetric analyzer. The TGA diagram is shown in FIG. 7 .

Form C is stable after storage at 25° C./60% RH and 40° C./75% RH (opened) for one week and does not change the characteristic peaks in the XRPD diagram under different humidity conditions.

Form C of Compound I has a solubility of 15.93 μg/mL after equilibrium in water at room temperature for 24 hours which is classified as almost insoluble or insoluble.

Form C is moderately hygroscopic.

Pharmaceutical Composition

The present invention is also directed to a pharmaceutical composition comprising a therapeutically effective amount of Form A, Form B, or Form C, or a mixture thereof, in any ratio, and a pharmaceutically acceptable carrier.

The crystalline Forms A, B and C are useful as an active pharmaceutical ingredient (API) in a pharmaceutical composition, with Forms A and C being preferred, and Form A being more preferred.

The following examples further illustrative the present invention. These examples are intended merely to be illustrative of the present invention and are not to be construed as being limiting.

›EXAMPLES

X-ray powder diffraction (XRPD) studies in the present disclosure were performed using a Bruker D8 ADVANCE X-ray powder diffractometer. The parameters of the XRPD method of Compound I were as follows:

X-ray reflection: Cu, Kα

Kα1 (Å): 1.540598; Kα2 (Å): 1.544426 Kα2/Kα1 intensity ratio: 0.50

Voltage: 40 kV Current: 40 mA Scanning range: from 3.0 to 40.0 degree Differential scanning calorimetry (DSC) data in the present disclosure were acquired by a TA DSC250. The parameters of the DSC method of Compound I were as follows: Heating rate: 10° C./min Purging gas: nitrogen Thermogravimetric analysis (TGA) data in the present disclosure were acquired by a TA TGA550. The parameters of the TGA method of Compound I were as follows: Heating rate: 10° C./min Purging gas: nitrogen Dynamic vapor sorption (DVS) data in the present disclosure were acquired by a SMS Intrinsic DVS. The parameters of the DVS method of Compound I were as follows: Temperature: 25° C. Gas and flow rate: nitrogen, 200 mL/min dm/dt: 0.002%/min Relative humidity (RH) range: 0% RH-95% RH

›Examples8

›Example 1. Preparation of Form A

The starting material Compound I (7.5 g) was dissolved in a mixed solvent of acetone (59.6 mL) and deionized water (15.6 mL) at 50° C., and the resulting solution was cooled to 30° C. and stirred for five hours. 20 mL deionized water was then added slowly and stirred for two hours, followed by slow addition of 45 mL deionized water. After additional two hours stirring, the temperature was lowered to 20-25° C., and crystals were precipitated out and filtered. The solid was washed with 15 mL 25% acetone in water twice and dried at 45° C. under vacuum for 18 hours to give 6.65 g of Form A.

The XRPD data of Form A comprising diffraction peaks are listed in Table 1. The XRPD diagram is shown in FIG. 1 . The DSC curve is shown in FIG. 2 . The TGA curve is shown in FIG. 3 .

›Example 2. Preparation of Form B

Form A of Compound I was heated to 200° C. and then cooled to room temperature to give an amorphous sample. About 25 mg of the amorphous sample in THF/water (4:1 v/v) was stirred for two hours and filtered. The filtrate was then cooled to 5° C. at 0.1° C./min. The crystals were centrifuged at 10000 rmp for 2 min and dried at room temperature under vacuum overnight to give Form B.

The XRPD data of Form B comprising diffraction peaks are listed in Table 2. The XRPD diagram is shown in FIG. 4 .

›Example 3. Preparation of Form C

About 30 mg Form B of Compound I was placed in a DVS analyzer with relative humidity changes from 50% RH to 90% RH by every 10% RH increase, and to 95% RH by a 5% RH increase, then to 0% RH, followed by changes to 95% RH in the same manners to give Form C. Form C can also be prepared by heating Form B of Compound I to 70° C. and then cooling to room temperature at a rate of 5-30° C./min.

The XRPD data of Form C comprising diffraction peaks are listed in Table 3. The XRPD diagram is shown in FIG. 5 . The DSC curve is shown in FIG. 6 . The TGA curve is shown in FIG. 7 .

›Example 4. Stability Assessment of Form A

About 10 mg Form A of Compound I was added to each 1.5-mL glass vial and stored at (i) 80° C. (closed) for one day, or (ii) 25° C./60% RH and 40° C./75% RH (opened) for one week, and then analyzed for XRPD and HPLC purity. The XRPDs are shown in FIGS. 8 , 9 and 10 have little or no change. The stability results are shown in Table 4, indicating no purity change neither.

›Example 5. Hygroscopicity Assessment of Form A

About 30 mg Form A of Compound I was assessed for hygroscopicity using a DVS analyzer, and tested by XRPD before and after DVS analysis. DVS is a gravimetric technique that measures how quickly and how much of a solvent is absorbed by a sample. The results showed that Form A had a water uptake of 0.14% under 80% RH, indicating that Form A is not hygroscopic ( FIG. 11 ). The XRPDs of Form A did not change before and after DVS testing ( FIG. 12 ).

›Example 6. Stability Assessment of Form C

About 10 mg Form C of Compound I was added to each 1.5-mL glass vial and stored under 25° C./60% RH ( FIG. 13 ) and 40° C./75% RH (opened, FIG. 14 ) for one week, and then analyzed for XRPD and HPLC purity. The XRPDs shown in FIGS. 13 and 14 have little or no change in the location of the characteristic peaks after one week. The stability results are shown in Table 5, indicating no significant purity change neither.

›Example 7. Hygroscopicity Assessment of Form C

About 30 mg Form C of Compound I was assessed for hygroscopicity using a DVS analyzer, and tested by XRPD before and after DVS analysis. The results showed that Form C had a water uptake of 5.44% under 80% RH, indicating that Form C is moderately hydgroscopic ( FIG. 15 ). The XRPDs of Form C did not change before and after DVS testing ( FIG. 16 ).

›Example 8. Interconversion of Forms A-C

The relationships among Forms A-C were investigated via heating and slurry competition experiments. Form C was converted to Form A upon heating to 145° C. and subsequently cooling to room temperature. Slurry of a mixture containing equal amounts of Form A and B in solvent systems of isopropyl alcohol/water under different water activities (a w =0˜1) at room temperature gave Form A. Overall Form A has better thermodynamic stability at room temperature than Form B and C. The interconversion relationship is shown in FIG. 17 .

The invention, and the manner and process of making and using it, are now described in such full, clear, concise and exact terms as to enable any person skilled in the art to which it pertains, to make and use the same. It is to be understood that the foregoing describes preferred embodiments of the present invention and that modifications may be made therein without departing from the scope of the present invention as set forth in the claims. To particularly point out and distinctly claim the subject matter regarded as invention, the following claims conclude the specification.

›Tables in the description — 5

TABLE 1

2theta	d-Spacing	Intensity (%)
6.66	13.26	19.2
8.69	10.17	0.6
10.05	8.79	16.3
10.96	8.06	33.9
12.62	7.01	0.8
13.29	6.65	5.1
13.99	6.33	40.8
14.55	6.08	0.5
15.71	5.64	14.3
16.14	5.49	17.1
17.42	5.09	67.0
17.82	4.97	41.1
18.36	4.83	4.0
19.90	4.46	17.6
20.29	4.37	3.1
20.63	4.30	3.3
21.58	4.11	10.9
22.14	4.01	100.0
22.85	3.89	16.2
23.40	3.80	18.7
24.07	3.69	29.8
24.91	3.57	22.9
25.43	3.50	4.1
26.37	3.38	5.0
26.74	3.33	7.2
27.48	3.24	4.9
28.28	3.15	55.5
29.74	3.00	2.3
30.50	2.93	10.3
31.86	2.81	6.0
32.35	2.77	4.6
33.27	2.69	1.3
33.88	2.64	3.4
34.53	2.60	3.6
35.17	2.55	8.2
35.55	2.52	1.8
36.04	2.49	1.4
36.61	2.45	2.2
36.83	2.44	2.0
37.51	2.40	1.8
38.64	2.33	5.9

TABLE 2

2theta	d-Spacing	Intensity (%)
3.83	23.03	29.5
4.68	18.86	23.3
6.09	14.50	31.3
7.73	11.42	1.4
9.04	9.77	100.0
10.03	8.82	43.7
11.49	7.69	57.4
12.40	7.13	89.3
14.59	6.07	24.4
15.34	5.77	82.0
16.19	5.47	30.2
17.44	5.08	8.3
17.80	4.98	17.1
19.25	4.61	83.5
20.46	4.34	20.9
22.81	3.90	6.3
23.52	3.78	13.1
23.61	3.77	11.3
24.99	3.56	10.7
26.22	3.40	12.9
27.46	3.25	7.8

TABLE 3

2theta	d-Spacing	Intensity (%)
4.65	19.01	13.8
5.81	15.19	16.7
7.68	11.50	13.7
8.68	10.18	82.9
9.31	9.49	53.2
10.33	8.56	12.7
11.62	7.61	14.7
12.72	6.95	100.0
14.23	6.22	8.9
15.52	5.71	13.8
15.66	5.65	16.6
16.41	5.40	99.0
17.50	5.06	24.7
19.33	4.59	49.7
21.58	4.12	10.0
23.46	3.79	12.8
24.76	3.59	25.2
25.64	3.47	13.9
25.83	3.45	11.3
27.61	3.22	4.7
29.50	3.03	2.7

TABLE 4 — Stability Testing Condition

			25° C./60% RH	40° C./75% RH
	Day 0	80° C. for 1 day	for 1 week	for 1 week
Purity (%)	99.75	99.77	99.78	99.76
Crystalline	A	A	A	A
Form

TABLE 1 — Stability Testing Condition

		25° C./60% RH for 1	40° C./75% RH for 1
	Day 0	week	week
Purity (%)	96.83	96.91	96.99
Crystalline Form	C	C	C

1 of 14 part labels are ours — the grant heads the rest

Claims as granted

6 claims

Classifications

1 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C07D403/04

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this application are not paired with the granted ones in what we hold.

File wrapper

⤢ drag to zoom

USPTOApplicanthover for detail · click to open

Pendency

2.9 y

1,064 days filing → grant

Office actions

none on record

Examiner

Adam C Milligan

art unit 1623 · TC 1600

Law firm

Law firm · Log in to unlock

Citations: 14 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Documents

Log in to open the documents of this file: the application as filed, every office action and response, the notice of allowance.

Chain of title

⤢ drag to zoom

Titlehover for detail · click to open

See the full assignment history — every owner this patent has passed through, with recordation dates and reel/frame numbers.