Patent ID: 11945882
Assignee: DAIICHI SANKYO COMPANY, LIMITED
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A  Y | IPC C

Claim 27:
28. The production method according to claim 3, wherein the compound represented by the formula (1) is produced by a production method (V),
wherein the production method (V) is a production method comprising the steps of:
reacting the compound represented by formula (2):, with lead tetraacetate to convert it into the compound represented by formula (3):, then
reacting the compound represented by the formula (3) with benzyl glycolate in the presence of an acid or a base to convert it into the compound represented by formula (4):, then
deprotecting a protecting group for an amino group of the compound represented by the formula (4) to convert it into the compound represented by formula (5):, then
condensing the compound represented by the formula (5) with the compound represented by formula (6):, to convert it into the compound represented by formula (7):, then
deprotecting protecting groups for an amino group and a carboxy group of the compound represented by the formula (7) to convert it into the compound represented by formula (8):, then
condensing the compound represented by the formula (8) with the compound represented by formula (9):, to convert it into the compound represented by formula (10):, and then
condensing the compound represented by the formula (10) with the compound represented by formula (11):, to convert it into the compound represented by formula (1):,