Enantioselective total synthesis of (+)-labd-8(17)-ene-3β,15-diol and (−)-labd-8(17)-ene-3β,7α,15-triol
摘要:
Enantioselective total synthesis of the labdane diterpenes (+)-labd-8(17)-ene-3 beta,15-diol ((+)-1) and (-)-labd-8(17)-ene-3 beta,7 alpha, 15-triol ((-)-2) was achieved starting from the (S)-(+)-enantiomer of the Wieland-Miescher ketone (+)-3 and the (R)-(+)-enantiomer of lactone (+)-13. These results established that the natural compounds (+)-1 and (-)-2 possess the (13S) absolute configuration. (C) 1997 Published by Elsevier Science Ltd.
Enantioselective total synthesis of (+)-labd-8(17)-ene-3β,15-diol and (−)-labd-8(17)-ene-3β,7α,15-triol
摘要:
Enantioselective total synthesis of the labdane diterpenes (+)-labd-8(17)-ene-3 beta,15-diol ((+)-1) and (-)-labd-8(17)-ene-3 beta,7 alpha, 15-triol ((-)-2) was achieved starting from the (S)-(+)-enantiomer of the Wieland-Miescher ketone (+)-3 and the (R)-(+)-enantiomer of lactone (+)-13. These results established that the natural compounds (+)-1 and (-)-2 possess the (13S) absolute configuration. (C) 1997 Published by Elsevier Science Ltd.
作者:G. Chandra、J. Clark、J. McLean、P. L. Pauson、J. Watson、R. I. Reed、F. M. Tabrizi
DOI:10.1039/jr9640003648
日期:——
A bis-labdenic diterpene from Moldenhawera nutans
作者:Juceni P David、Jorge M David、Shu-Wei Yang、Geoffrey A Cordell
DOI:10.1016/s0031-9422(98)00590-1
日期:1999.2
A new bis-diterpene, moldenin (6), derived from the esterification of 3-oxo-8(17)-15-labdenic acid with 3 beta-hydroxy-8(17)-15-labdenol, four normal-labdane diterpenes 1-4, and betulinic add were isolated from the stems of Moldenhawera nutans. The structures were established on the basis of their spectral data. (C) 1998 Elsevier Science Ltd. All rights reserved.