One - pot synthesis of novel sulfur and selenium heterocycles by directed ortho-lithiation
作者:S. W. Wright
DOI:10.1002/jhet.5570380330
日期:2001.5
phosgene and the 1,2-dioxo-2-phenyl-2,3-dihydrobenzo[e][1,4,2]dithiazine-3-one ring system with thiophosgene. Use of selenium in place of sulfur afforded the novel analogous selenium heterocycles, however in the case of benzamides the use of selenium and phosgene afforded benzo[d]isoselenazol-3-ones unexpectedly.
报道了通过直接锂化和用硫和光气顺序处理由苯甲酰胺合成苯并[ e ] [1,3]噻嗪-2,4-二酮的方法。使用硫光气可得到2-硫氧代-2,3-二氢-苯并[ e ] [1,3]噻嗪-4-酮。该方法在苯磺酰胺上的应用提供了以前未知的带有光气和1,2-二氧-2-的1,1-二氧-1,2-二氢-1,4-二硫-2-氮杂-萘-3-环体系-苯基-2,3-二氢苯并[ e ] [1,4,2]二噻嗪-3-具有硫光气的环系统。用硒代替硫提供了新颖的类似硒杂环,但是在苯甲酰胺的情况下,使用硒和光气意外地得到了苯并[ d ]异硒烯唑-3-酮。