Stereoselective synthesis and structural variations of ethyl analogues of galbanum macrolides
摘要:
Both enantiomers of 13-pentadecanolide and 15-heptadecanolide, higher analogues of galbanum macrolides, were prepared via ring enlargement of cyclodecanone and cyclododecanone, respectively. Conversion of the intermediate oxo lactones to methylenated ethyl galbanum macrolides by Wittig olefination shifted the olfactory properties dramatically. (C) 1999 Elsevier Science Ltd. All rights reserved.
Synthesis of the Conjugated Tetraene Acid Side Chain of Mycolactone E by Suzuki-Miyaura Cross-Coupling Reaction of Alkenyl Boronates
作者:Yuan Wang、Wei-Min Dai
DOI:10.1002/ejoc.201301484
日期:2014.1
The conjugated tetraene acid sidechain of mycolactone E has been synthesized by the cross-coupling reaction of a trisubstituted triene bromide with a trisubstituted alkenyl boronate catalyzed by Pd(OAc)2–Aphos-Y under mildly basic conditions [K3PO4·3H2O, H2O, tetrahydrofuran (THF), 35 °C, 18 h]. The conjugated tetraene product was obtained in 85 % yield without geometrical isomer(s) under the catalytic