Chemoenzymatic approach to the AB ring system of aklavinone
摘要:
Both enantiomers of compound 3, a possible intermediate for the AB ring system 2 of Aklavinone 1, were obtained in optically active form from diol 7. Key steps were the preparation of both enantiomers of monoacetate 8d, via enzymatic reactions that utilize PPL as catalyst, and the construction of ring A in a totally regioselective manner.
Enantio- and diastereoselective synthesis of the AB ring system of aklavinone by coupling a chemoenzymatic procedure with organometal chemistry
作者:Luca Banfi、Giuseppe Guanti、Renata Riva
DOI:10.1016/0040-4020(96)00804-6
日期:1996.10
Two different approaches were investigated in order to prepare the title compound 2; best results were obtained when the tandem reduction/intramolecular hydroxyalkylation of the appropriate 5-alkoxy-(3-hydroxyphenyl)pentanoate was performed on an ester of chemoenzymatic origin, already bearing the two chiral centers present in 2 with the correct relative and absolute stereochemistry.
Both enantiomers of compound 3, a possible intermediate for the AB ring system 2 of Aklavinone 1, were obtained in optically active form from diol 7. Key steps were the preparation of both enantiomers of monoacetate 8d, via enzymatic reactions that utilize PPL as catalyst, and the construction of ring A in a totally regioselective manner.