Patent ID: 7816401

Claim:
A process for producing a compound represented by Formula (11): wherein P 1 , P 7 , P 8 , P 9 and R 1 are the same as defined below, characterized by comprising reacting a compound represented by Formula (12): wherein P 7 means a hydrogen atom or a protecting group for hydroxy group; and R 1 means a hydrogen atom or a hydroxy group, with a compound represented by Formula (13): wherein P 1 means a hydrogen atom or a protecting group for hydroxy group; P 8 means a hydrogen atom, an acetyl group or a protecting group for hydroxy group; P 9 means a hydrogen atom or a protecting group for hydroxy group; or P 8 and P 9 may form together a group represented by a formula: wherein R 5 means a phenyl group which may be substituted, in the presence of a catalyst.