Synthesis of chiral alkenyl epoxides: the sex pheromone of the elm spanworm Ennomus subsignaria (Hübner) (Lepidoptera: Geometridae)
摘要:
The identification of the sex pheromone of the elm spanworm Ennomos subsignaria (Hubner), as the chiral alkenyl epoxide (6Z)-cis-9,10-epoxy-nonadecene has been accomplished. Both enantiomers of (6Z)-cis-9,10-epoxy-nonadecene have been synthesized via two routes. The key steps in the first route were to prepare both threo-epoxy tosylates and then to perform an alkylative rearrangement of these intermediates to obtain the target molecules. An alternative enantioenriched synthesis that took advantage of the Sharpless dihydroxylation reaction was developed so that a common starting material could be used to access both enantiomers. A field study and GC/EAD testing indicated that Z6-cis-9S,10R-epoxy-nonadecene was the sex pheromone of the elm spanworm E. subsignaria (Hubner). (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of chiral alkenyl epoxides: the sex pheromone of the elm spanworm Ennomus subsignaria (Hübner) (Lepidoptera: Geometridae)
作者:David I. MaGee、Peter J. Silk、Junping Wu、Peter D. Mayo、Krista Ryall
DOI:10.1016/j.tet.2011.05.015
日期:2011.7
The identification of the sex pheromone of the elm spanworm Ennomos subsignaria (Hubner), as the chiral alkenyl epoxide (6Z)-cis-9,10-epoxy-nonadecene has been accomplished. Both enantiomers of (6Z)-cis-9,10-epoxy-nonadecene have been synthesized via two routes. The key steps in the first route were to prepare both threo-epoxy tosylates and then to perform an alkylative rearrangement of these intermediates to obtain the target molecules. An alternative enantioenriched synthesis that took advantage of the Sharpless dihydroxylation reaction was developed so that a common starting material could be used to access both enantiomers. A field study and GC/EAD testing indicated that Z6-cis-9S,10R-epoxy-nonadecene was the sex pheromone of the elm spanworm E. subsignaria (Hubner). (C) 2011 Elsevier Ltd. All rights reserved.
Neurotrophic peptide aldehydes: Solid phase synthesis of fellutamide B and a simplified analog
作者:John S. Schneekloth、John L. Sanders、John Hines、Craig M. Crews
DOI:10.1016/j.bmcl.2006.04.029
日期:2006.7
have been used to complete the total synthesis of the neurotrophic lipopeptide aldehyde fellutamide B (2). The beta-hydroxy aliphatic tail was prepared by regioselective reductive opening of a cyclic sulfate, and later coupled to a solid phase resin. The synthetic compound was then examined in cytotoxicity and nerve growth factor (NGF) induction assays. A simplified analog of fellutamide B also showed
已使用固相和液相合成方法的组合来完成神经营养性脂肽醛非鲁胺 B (2) 的全合成。β-羟基脂肪族尾部是通过环状硫酸盐的区域选择性还原开环制备的,然后与固相树脂偶联。然后在细胞毒性和神经生长因子 (NGF) 诱导试验中检查合成化合物。非鲁胺 B 的简化类似物也显示出活性。