There is disclosed a process for producing an optically active hemiester of formula (1): wherein R1, R2 and R5 represent the same meanings as described below, which comprises reacting a cyclic acid anhydride of formula (2): wherein R1 and R2 are different and independently representa hydrogen atom, a halogen atom,an alkyl group optionally substituted with an alkoxy group or a halogen atom, and the like, with a hydroxy compound of formula (3):R3OH (3) wherein R3 representsan alkyl group optionally substituted with an alkoxy group, a phenoxy group, a dialkylamino group or a halogen atom and the like, in the presence of an asymmetric catalyst.

Claims

8 · 1 independent · depth 4

8 granted claims

›1.independentA process for producing an optically active imidazolidin-2-one of formula (4): wherein R 21 and R 3 represents the same meanings as described below, w…+7

›2.↳ 1The process according to claim 1 , wherein R 21 represents a linear, branched or cyclic (C1-C10)alkyl group optionally substituted with a halogen atom…d2+2

›3.↳ 1multiple · 1, 2The process according to claim 1 or 2 , wherein reacting of said cyclic acid anhydride of formula (5) with said hydroxy compound of formula (3) is con…d2+2

›4.↳ 1The process according to claim 1 , wherein R 21 is an aralkyl group optionally substituted with an alkyl group, an alkoxy group or a halogen atom.d2

Classifications

3 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C07D2/3302

USPC · US Patent Classification

548/316.4548/316.7

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Pendency

1.6 y

599 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Joseph K. McKane

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