An allylic isoprenoid C5 nucleophile for the synthesis of forskolin
摘要:
InCl3-mediated coupling of delta-alkoxy allylic stannane 9b with aldehydes has been shown to give the a-coupling products in high yield, probably via two S-E' processes. Most specifically, drimenal (rac-1) has been converted into labdane derivative 17 which is considered to be an important intermediate on the way to forskolin. (C) 1997 Published by Elsevier Science Ltd.
Cholesterol plays the role of membrane reinforcer in eukaryotes, whereas hopanoids play the same role in bacteria. Which components could have reinforced 'primitive' membranes? We describe here an efficient biomimetic synthesis of bi- and tri-cyclopolyprenols and demonstrate that these compounds reinforce the membranes of polyprenyl phosphate, which we speculated as 'primitive' membranes. (c) 2007 Elsevier Ltd. All rights reserved.
SAKURAI A.; HAYASHI T.; HORI I.; JINDO Y.; OISHI T., SYNTHESIS, 1978, NO 5, 370-372
作者:SAKURAI A.、 HAYASHI T.、 HORI I.、 JINDO Y.、 OISHI T.