Patent ID: 9388157
Filing Date: 2016-07-12
CPC Classification: A61K,A61P,C07D

Claim Text:
1. A method of preparing a compound represented by the general formula (I): wherein R represents a single bond or a double bond; represents α configuration; represents β configuration; and represents α configuration, β configuration or an arbitrary mixture thereof, or a salt thereof; wherein the method comprises: reacting a compound represented by general formula (IIA) with a compound represented by general formula (IIA): wherein T if W represents a C1-6 alkyl group substituted with 1 to 5 oxo groups, then a step (2) of reducing the oxo group substituents of the C1-6 alkyl group represented by W, and a step (3) of deprotecting the reduced product of step (2) by removing the protective group.