75288-52-7

Upstream product

• 75288-50-5 7-(2-hydroxyethyl)-2-methylbenzothiophen 
• 98-59-9 p-toluenesulfonyl chloride 
• 6320-02-1 o-bromothiophenol 
• 75288-48-1 2-chloroprop-2-enyl 2-bromophenyl sulphide 
• 75288-49-2 7-bromo-2-methylbenzothiophen 

Relevant academic research and scientific papers

The Synthesis of Thiophenium and Oxazolium Salts from Diazoketones

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.