METHOD FOR MANUFACTURING NEURAMINIC ACID DERIVATIVES

摘要

A method for manufacturing a compound represented by the formula (9) is provided: (see formula 9) wherein R 2 represents a C1-C4 alkyl group, R3 represents a C1-C6 alkyl group, R4 and R5, independently from each other, represent a hydrogen atom, a C1-C6 alkyl group or a phenyl group, or R4 and R5 together form a tetramethylene group, a pentamethylene group or an oxo group, and Ac represents an acetyl group.