An Expeditious Synthesis of Geodiamolide A, an 18-Membered Cytotoxic Depsipeptide from Marine Sponges
摘要:
Geodiamolide A (1) has been efficiently synthesized from the polypropionate and tripeptide units using the Evans asymmetric alkylation, the Mitsunobu esterification, and the macrolactamization with diphenyl phosphorazidate (DPPA) as key steps. Efficient esterification between the complex polyketide and tripeptide units was also realized under high pressure conditions.
Geodiamolide A (1a) and jaspamide (2) have been efficiently synthesized by use of the Evans asymmetric alkylation, the Mitsunobu esterification, and the DPPA macrolactamization as key steps.
Geodiamolide A (1) has been efficiently synthesized from the polypropionate and tripeptide units using the Evans asymmetric alkylation, the Mitsunobu esterification, and the macrolactamization with diphenyl phosphorazidate (DPPA) as key steps. Efficient esterification between the complex polyketide and tripeptide units was also realized under high pressure conditions.