Aromatic [5,5]‐sigmatropic rearrangement is an appealing protocol for accessing 1,4‐substituted arenes. However, such a protocol has not been well utilized in organicsynthesis because of the difficulties in the synthesis of the substrates, selectivity issues, and limited substrate scope. Described herein is a new [5,5]‐sigmatropic reaction utilizing readily available aryl sulfoxides and allyl nitriles
芳香族[5,5] -sigmatropic重排是一种吸引人的协议,可用于访问1,4-取代的芳烃。但是,由于底物的合成困难,选择性问题以及底物范围有限,这种方案在有机合成中并未得到很好的利用。本文描述的是一种新的[5,5]-σ反应,利用易获得的芳基亚砜和烯丙基腈。该反应具有温和的反应条件,高的化学和区域选择性,出色的官能团相容性以及广泛的底物范围。计算研究表明,反应的成功可归因于重排前体的选择性亲电组装,其中线性-C = C = N-键比竞争性[3,3]更有利于[5,5]-σ重排。 ]-σ重排。
Synthesis and antiherpetic activity of (.+-.)-9-[[(Z)-2-(hydroxymethyl)cyclopropyl]methyl]guanine and related compounds
作者:Wallace T. Ashton、Laura Canning Meurer、Christine L. Cantone、A. Kirk Field、John Hannah、John D. Karkas、Richard Liou、Gool F. Patel、Helen C. Perry
DOI:10.1021/jm00120a010
日期:1988.12
activity against herpes simplex virus types 1 and 2 in vitro. Certain of the guanine or 8-azaguanine derivatives were good substrates for the viral thymidine kinase and were further converted to triphosphate, but none was a potent inhibitor of the viral DNApolymerase. Nevertheless, one member of this group, (+/-)-9-[[(Z)-2-(hydroxymethyl)cyclopropyl]methyl]guanine (3a), displayed significant antiherpetic