Patent ID: 8993800
Filing Date: 2015-03-31
Classification: C07C,C07D,C12P

Abstract:
1. A process for, producing α-methyl-D-cysteine represented by formula (9) or its salt: the process comprising hydrolyzing a D-5-methyl-5-thiomethylhydantoin derivative represented by formula (2) or its salt: (wherein R 1 represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 carbon atoms) to produce an α-methyl-D-cysteine derivative represented by formula (8) or its salt: (wherein R 2 is the same as R 1 ), and treating the α-methyl-D-cysteine derivative represented by formula (8) or its salt with an acid to deprotect the sulfur atom.