Total syntheses of the diterpenoids (−)-kolavenol and (−)-agelasine B
摘要:
The trans-clerodane diterpenoids (-)-kolavenol (2) and (-)-agelasine B (1) have been prepared from the enantiomerically pure decalone 3. The key steps of the syntheses involve the stereoselective alkylation of the nitrile 4 (to give 5), the efficient coupling of the iodides 10 and 11 to produce the clerodane skeleton 12, and the electrochemical reduction of 16 to provide (-)-1.
AgelasinB and itsanalogues with various terpenoid chains have been synthesized by the alkylation of N6-methoxy-9-methyladenine with the appropriate alkyl bromides followed by treatment of the products with zinc dust–aqueous acetic acid.
Total syntheses of the diterpenoids (−)-kolavenol and (−)-agelasine B
作者:Edward Piers、Jacques Y. Roberge
DOI:10.1016/s0040-4039(00)60896-1
日期:1992.11
The trans-clerodane diterpenoids (-)-kolavenol (2) and (-)-agelasine B (1) have been prepared from the enantiomerically pure decalone 3. The key steps of the syntheses involve the stereoselective alkylation of the nitrile 4 (to give 5), the efficient coupling of the iodides 10 and 11 to produce the clerodane skeleton 12, and the electrochemical reduction of 16 to provide (-)-1.