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

Claim 16:
17. The production method according to claim 8, wherein the compound represented by the formula (B) is produced by a production method (IV),
wherein the production method (IV) is a production method comprising the steps of:
reacting a compound represented by formula (H):, wherein R3 represents an amino group protected with a protecting group, with lead tetraacetate to convert it into a compound represented by formula (J):, wherein R3 represents the same meaning as above; then
reacting the compound represented by the formula (J) with a compound represented by formula (K):, wherein R2 represents the same meaning as the R2 according to claim 8, in the presence of an acid or a base to convert it into a compound represented by formula (L):, wherein R2 and R3 represent the same meanings as above; then
deprotecting the protecting group for the amino group of the compound represented by the formula (L) to convert it into a compound represented by formula (M):, wherein R2 represents the same meaning as above; and then
condensing the compound represented by the formula (M) with a compound represented by formula (N):, wherein R1 represents the same meaning as the R1 according to claim 8, to convert it into the compound represented by the formula (B):, wherein R1 and R2 represent the same meanings as above.