Synthesis of 3-iodobenzo[b]thiophenes via iodocyclization/etherification reaction sequence
作者:Tanay Kesharwani、Jason Craig、Cathlene Del Rosario、Renee Shavnore、Cory Kornman
DOI:10.1016/j.tetlet.2014.10.064
日期:2014.12
An efficient method was developed for the synthesis of benzo[b]thiophene core structure using a two-step, multicomponent reaction resulting in favorable yields. This convergent reaction requires room temperature thus eliminating the harsh reaction conditions usually associated with the synthesis of benzo[b]thiophene ring structures. Used in many drugs that treat conditions such as osteoporosis, asthma, and fungal infections, the benzo[b]thiophene core structure is of extreme importance to medicinal and pharmaceutical research. The key step in this process involves the use of an iodine as a cyclizing agent that acts simultaneously as a catalyst. Alcohols such as alkyl, allyl, propargyl, and benzylic are employed to prepare a diverse library of 3-iodobenzo[b]thiophenes. (C) 2014 Elsevier Ltd. All rights reserved.