作者:Latifa Semmak、Abdelfetta Zerzouf、Robert Valls、Bernard Banaigs、Gerard Jeanty、Christian Francisco
DOI:10.1016/0031-9422(88)80159-6
日期:1988.1
Abstract Two new acyclicditerpenes have been isolated from the brown alga BifurcariaBifurcata. They were characterized by spectral and chemical methods.
Enantioselective synthesis of (−)-Bifurcadiol: a natural antitumor marine product
作者:Stéphane Di Guardia、Robert Valls、Véronique Mesguiche、Jean-Michel Brunel、Gérald Culioli
DOI:10.1016/s0040-4039(99)01726-8
日期:1999.11
The enantioselective synthesis of natural antitumor (-)-Bifurcadiol involving an alkylation key-step reaction is reported. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
SEMMAK, LATIFA;ZERZOUF, ABDELFETTA;VALLS, ROBERT;BANAIGS, BERNARD;JEANTY,+, PHYTOCHEMISTRY, 27,(1988) N 7, C. 2347-2349
α-dimethyl allyl boronic ester. The transformation provides expedient access to a wide array of aryl, heteroaryl, aryl-substituted alkenyl and primary and secondary aliphatic homoprenyl alcohols with excellent asymmetric induction. The utility of this asymmetric catalysis strategy has been demonstrated through a short and efficient total synthesis of the two natural products (−)-rosiridol and (−)-bifurcadiol
Four novel diterpenes were isolated from the brown alga Bifurcariabifurcata collected off the Atlantic coast from Morocco, and their structures established by spectral and chemical methods. These compounds are acyclicditerpenes derived from (S)-12-hydroxygeranylgeraniol. One of them is its dehydration product at C-12, while the others are its oxidation derivatives: the methyl ester of the acid at