343232-21-3Relevant academic research and scientific papers
The Synthesis of Thiophenium and Oxazolium Salts from Diazoketones
Acheson, R. Morrin,Cooper, Martin W.
, p. 1185 - 1193 (2007/10/02)
4-Diazoacetylthianthren with perchloric acid in acetonitrile gave 2-oxo-1,2-dihydrothieno-thianthrenium perchlorate which gave the corresponding enol ether with diazomethane.This ether was compared with 3-methoxy-1-methylbenzothiophenium perchlorate, prepared from 3-methoxythiophen, and which was much more stable to solvolysis than the demethoxy-analogue.In contrast to the 4-diazoacetylthianthren, 7-diazoacetyl-2-methylbenzothiophen with acetonitrile and perchloric acid cyclized in an alternative mode to give a new synthesis of 2-methyl-4-substituted oxazolium perchlorates.
