Ring A Functionalization of Terpenoids by the Unusual Baeyer-Villiger Rearrangement of Aliphatic Aldehydes
作者:Alejandro F. Barrero、E. J. Alvarez-Manzaneda、R. Alvarez-Manzaneda、Rachid Chahboun、R. Meneses、Marta Aparicio B.
DOI:10.1055/s-1999-2722
日期:1999.6
A new methodology is described for transforming resinic acids into nor-alcohols and nor-olefins, via the Baeyer-Villiger rearrangement of the derived aldehyde. Based on this methodology 4-hydroxy-18-nor-abieta-8,11,13-trien-7-one and 18-nor-abieta-8,11,13-triene-4,7α-diol, two new terpenoids recently described, have been synthesized from abietic acid.
The first syntheses of cytotoxicmarine arenarans A and B starting from commercial (−)-sclareol are reported. The oxocene ring of the target compound is formed via ring-closing metathesis, a process that depends on certain structural requirements. The trans-fused structure of the naturalproduct is confirmed by comparison with the cis-fused isomer, which was synthesized. This synthetic strategy is
A new enantiospecific route toward monocarbocyclic terpenoids: Synthesis of (−)- caparrapi oxide
作者:Alejandro F. Barrero、Enrique J. Alvarez-Manzaneda、Rachid Chahboun、M. Coral Páiz
DOI:10.1016/s0040-4039(98)02119-4
日期:1998.12
A new and efficient strategy is described for carrying out the enantiospecific synthesis of monocarbocyclic terpenoids from (−)-sclareol (1). The key steps are the Grob scission of 11-p-toluenesulphonyloxydriman-7α-ol (2) to give the tobacco seco-sesquiterpene 3 and the Baeyer-Villiger oxidation of 4-[(1′S, 2′S)-2′-formyl-2′,6′,6′-trimethylcyclohexyl]-2-butanone (4), derived from 3. The first enantiospecific