Regioselective synthesis of quinolone-annulated sulfur heterocycles by aryl radical cyclization
作者:K.C. Majumdar、P.P. Mukhopadhyay、A. Biswas
DOI:10.1016/j.tetlet.2005.07.151
日期:2005.9
of a number of sulfides and sulfones under mild, neutral conditions, have been investigated accompanied by some amount of β-scission product for sulfides. The sulfides were derived from 4-mercaptoquinolone and 2-bromobenzyl bromides by phase transfer catalyzed reaction and the corresponding sulfones were prepared by treatment of the sulfides with m-CPBA at room temperature. The sulfides and the corresponding
已经研究了在温和的中性条件下,氢化锡介导的许多硫化物和砜的环化反应,以及一定量的硫化物β-分裂产物。通过相转移催化反应从4-巯基喹诺酮和2-溴苄基溴衍生硫化物,并通过在室温下用m -CPBA处理硫化物来制备相应的砜。然后使硫化物和相应的砜与n Bu 3 SnH-AIBN反应,得到区域选择性的喹诺酮环化的硫杂环。