A diamine of formula (I) is described, in which A is hydrogen or a saturated or unsaturated C1-C20 alkyl group or an aryl group; B is a substituted or unsubstituted C1-C20 alkyl, cycloalkyl, alkaryl, alkaryl or aryl group or an alkylamino group and at least one of X 1 , X 2 , Y 1 , Y 2 or Z is a C1-C10 alkyl, cycloalkyl, alkaryl, aralkyl or alkoxy substituting group. The chiral diamine may be used to prepare catalysts suitable for use in transfer hydrogenation reactions. [structure]

Claims

20 · 1 independent · depth 5

20 granted claims

›1.independentA diamine of formula (I)+19

›2.↳ 1The diamine according to claim 1 wherein A is hydrogen.d2+6

›3.↳ 1The diamine according to claim 1 wherein B is a substituted or unsubstituted aryl group.d2+2

›4.↳ 1The diamine according to claim 1 wherein Z is methyl.d2

›5.↳ 1The diamine according to claim 1 wherein Z is methoxy.d2

›6.↳ 1The diamine according to claim 1 wherein the diamine is homochiral.d2

›7.↳ 1The method for preparing a diamine of formula (I) as claimed in claim 1 comprising the steps ofna) forming a substituted spiroimidazole from a substit…d2

›8.↳ 1A catalyst comprising the reaction product of a diamine of formula (I) as claimed in claim 1 and a compound of a metal selected from the list consisti…d2+3

›20.↳ 1The diamine according to claim 1 having an enantiomeric excess of greater than 70%.d2

Classifications

9 codes

IPC · International Patent Classification

Section C — Chemistry; metallurgy

C07C311/03
C07C311/21
C07C311/16
C07C303/38

USPC · US Patent Classification

564/92568/630502/155568/812568/814

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Pendency

3.9 y

1,442 days filing → grant

Office actions

non-final + final

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1 RCE

Examiner

Peter G O'Sullivan

art unit 1621 · TC 1600

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20080081930 A1	3 Apr 2008

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