Pheromone synthesis. Part 244: Synthesis of the racemate and enantiomers of (11Z,19Z)-CH503 (3-acetoxy-11,19-octacosadien-1-ol), a new sex pheromone of male Drosophila melanogaster to show its (S)-isomer and racemate as bioactive
摘要:
The enantiomers of (11Z,19Z)-3-acetoxy-11,19-octacosadien-1-ol were synthesized from the enantiomers of 3,4-epoxy-1-butanol PMB ether. Its racemate was also synthesized. Its (S)-isomer and racemate were shown to possess the same pheromone activity as CH503, a long-lived inhibitor of male courtship in Drosophila melanogaster, although the racemate was less active. (C) 2010 Elsevier Ltd. All rights reserved.
Medium and Large <i>N</i>-Heterocycle Formation via Allene Hydroamination with a Bimetallic Rh(II) Catalyst
作者:Kelton G. Forson、Benjamin O. Bohman、Coriantumr Z. Wayment、Rachel N. Owens、Caitlyn E. McKnight、Rhen C. Davis、Lillian R. Stillwell、Stacey J. Smith、David J. Michaelis
DOI:10.1021/jacs.1c10534
日期:2022.1.12
We report the synthesis of a 2-phosphinoimidazole-derived bimetallic Rh(II) complex that enables intramolecular allene hydroamination to form 7- to 10-member rings in high yield. Monometallic Rh complexes, in contrast, fail to achieve any product formation. We demonstrate a broad substrate scope for formation of various N-heterocycles. Macrocyclizations that form 11- to 15-member N-heterocycles are
Pheromone synthesis. Part 244: Synthesis of the racemate and enantiomers of (11Z,19Z)-CH503 (3-acetoxy-11,19-octacosadien-1-ol), a new sex pheromone of male Drosophila melanogaster to show its (S)-isomer and racemate as bioactive
作者:Kenji Mori、Yasumasa Shikichi、Shruti Shankar、Joanne Y. Yew
DOI:10.1016/j.tet.2010.06.080
日期:2010.8
The enantiomers of (11Z,19Z)-3-acetoxy-11,19-octacosadien-1-ol were synthesized from the enantiomers of 3,4-epoxy-1-butanol PMB ether. Its racemate was also synthesized. Its (S)-isomer and racemate were shown to possess the same pheromone activity as CH503, a long-lived inhibitor of male courtship in Drosophila melanogaster, although the racemate was less active. (C) 2010 Elsevier Ltd. All rights reserved.