135901-07-4Relevant academic research and scientific papers
Further Examples of Tandem Dimerization Ring-Opening of Substituted 3-Bromothiophene 1,1-Dioxides. Preparation of Trisubstituted Benzenes. X-Ray Structure Determination of 3,5-Dibromo-7,7a-dimethyl-2,4-diphenyl-cis-3a,7a-dihydrobenzothiophene 1,1-Dioxide
Gronowitz, Salo,Nikitidis, Grigorios,Hallberg, Anders,Stalhandske, Claes
, p. 636 - 643 (2007/10/02)
Stirring 3-bromo-2-methylthiophene 1,1-dioxide, 3-bromo-2-butylthiophene 1,1-dioxide and 3-bromo-2-phenylthiophene 1,1-dioxide at room temperature with basic alumina in pentane-dichloromethane solution led to dihydrobenzothiophene 1,1-dioxides.Refluxing of the same reaction mixtures led to the ring-opening products, the trisubstituted benzenes.Refluxing of 3-bromo-5-methyl-2-phenylthiophene 1,1-dioxide in decalin afforded the 3,5-dibromo-7,7a-dimethyl-2,4-diphenyl-cis-3a,7a-dihydrobenzothiophene 1,1-dioxide.The structure was established by X-ray crystallography.
