The Origins of the Benzotriazole Project, Its Versatility Illustrated by a New -C=CHCH+OEt Synthon, and Novel Syntheses of α,β-Unsaturated Aldehydes and Ketones, Furans, Pyrroles and Allyl Ethers
作者:Alan R. Katritzky、Hong Wu、Linghong Xie、Stanislaw Rachwal、Bogumila Rachwal、Jinlong Jiang、Guifen Zhang、Hengyuan Lang
DOI:10.1055/s-1995-4102
日期:1995.10
A historical introduction describes the discovery and progress of benzotriazole synthetic methodology. 3-(Benzotriazol-1-yl)-1-ethoxyprop-1-ene (6), readily prepared from 3-(benzotriazo-1-yl)-3-ethoxyprop-1-ene (4) via zinc bromide promoted allylic rearrangement, undergoes lithiation and regiospecific single or double 3-alkylation to give products which undergo (i) hydrolysis to afford α,β-unsaturated aldehydes, (ii) silica gel promoted reverse allylic rearrangement of the benzotriazolyl group, followed by further alkylation and subsequent hydrolysis to furnish α,β-unsaturated ketones, (iii) intramolecular cyclizations to construct pyrroles and furans, and (iv) intermolecular nucleophilic substitution with Grignard reagents to provide allyl ethers.
历史简介介绍了苯并三唑合成方法的发现和进展。3-(苯并三唑-1-基)-1-乙氧基丙-1-烯 (6) 很容易通过溴化锌促进的烯丙基重排反应从 3-(苯并三唑-1-基)-3-乙氧基丙-1-烯 (4) 中制备出来,经过石化作用和特定区域的单或双 3-烷基化反应,得到的产物会经过 (i) 水解反应生成δ,δ-不饱和醛、(iii) 分子内环化反应生成吡咯和呋喃,以及 (iv) 分子间亲核取代反应生成烯丙基醚。