Patent ID: 8334405

Claim:
A chiral thiourea represented by formula (II): wherein R 1 is a substituted or un-substituted aralkyl group or a substituted or un-substituted aryl group; R 6 is a substituted or un-substituted lower alkyl group, a substituted or un-substituted aralkyl group, a substituted or un-substituted aryl group, a substituted or un-substituted heteroaryl group, or is: wherein C 3 is a chiral carbon atom, Y is S or O, and R 7 and R 8 independently are an alkyl, alkenyl, alkynyl, acyl, thioacyl, alkylthio, imine, amide, phosphoryl, phosphonate, phosphine, carbonyl, carboxyl, carboxamide, anhydride, silyl, thioakyl, alkylsulfonyl, arylsulfonyl, ketones, aldehyde, ester, heteroalkyl, amidine, acetal, ketal, aryl, heteroaryl, aziridine, carbamate, imide, oxime, sulfonamide, thioamide, thiocarbamate, urea, or thiourea.