Patent ID: 8030496

Claim:
A production process of a compound represented by the following formula (7-1): wherein Y represents a group represented by the following formula: wherein R 1 to R 4 may be the same or different and respectively represent a hydrogen atom, optionally substituted aryl group, optionally substituted heteroaryl group, optionally substituted linear or branched alkyl group, optionally substituted linear or branched alkenyl group or optionally substituted linear or branched alkynyl group, and Z represents an oxygen atom or a sulfur atom; Q represents a protected carbonyl group; D represents —(CH 2 ) m —R′, where m represents an integer of 0 to 10, and R′ represents a hydrogen atom, linear or branched alkyl group, linear or branched alkynyl group, linear or branched alkenyl group, cycloalkyl group, optionally substituted heterocyclic group, optionally substituted aryl group, optionally substituted heteroaryl group, —OX group, where X represents a hydrogen atom, linear or branched alkyl group, linear or branched alkynyl group, linear or branched alkenyl group, cycloalkyl group or optionally substituted aryl group, or halogen atom; n represents an integer of 0 to 10; P represents a protecting group of a hydroxyl group; and P′ represents a protecting group of a carboxyl group, comprising a step in which a compound represented by the following formula (1-8): wherein Y, Q, D and n are the same as defined above, is reacted with a compound represented by the following formula (3-6): wherein P and P′ are the same as defined above, in the presence of a base.