Preparation and synthetic utility of cyclopropyl phenyl sulfides
作者:C.L. Bumgardner、J.R. Lever、S.T. Purrington
DOI:10.1016/s0040-4039(00)87347-5
日期:1982.1
Primary alkyl halides and epoxides react with 1-lithiocyclopropyl phenyl sulfide to give derivatives suitable for transformation to carbonyl compounds or for desulfurization.
Acid-catalyzed thermolysis of dicyclopropyl ketimines. Substituent effects on the course of the rearrangement
作者:Harry H. Wasserman、Robert P. Dion
DOI:10.1016/s0040-4039(00)86285-1
日期:1983.1
cyclopropyl pyrrolines resulting from SN2 ring-opening by the nucleophilic halide. In the absence of a nucleophilic counterion, the acid-catalyzed thermolyses lead to pyrroles if there can be stabilization of cationic intermediates by an electron-releasing substituent.
在用卤化铵热解时,二环丙基酮亚胺产生环丙基吡咯啉,这是由于亲核卤化物使S N 2开环而产生的。在不存在亲核抗衡离子的情况下,如果可以通过释放电子的取代基稳定阳离子中间体,则酸催化的热解会生成吡咯。
Prostaglandin analogs possessing antinidatory effects. 1. Modification of the .omega. chain
Novel prostaglandin analogues modified in the omega chain were prepared by the reaction of the vinyl aldehydes 1a--e with a variety of organometallic reagents as a key step of the syntheses. Compared with the natural prostaglandin F2 alpha in antinidatory effect, the analogues 4, 7, and 10 were 40 times more potent and the analogue 11 was 50--100 times more potent in the rat.
Olefins including alkylidenecyclopropanes are readily prepared from the corresponding selenides by reaction of base on the corresponding selenonium salt. The reaction also applies to cyclopropylsulfides.
The reaction of 3-phenylthio-2-(phenylthiomethyl)propanal with organolithium reagents and carbonyl compounds provides a stereo- and regio-selective one-pot route to polyfunctionalized cyclopropane derivatives.