Cycloaddition Chemistry of 1,3-Thiazolium-4-olate Systems. Reaction with Nitroalkenes and Interpretation of Results Using PM3 Calculations
作者:Martín Avalos、Reyes Babiano、Andrés Cabanillas、Pedro Cintas、Francisco J. Higes、José L. Jiménez、Juan C. Palacios
DOI:10.1021/jo952275g
日期:1996.1.1
room temperature in methylene chloride (48 h) resulted in two readily separable diastereomeric racemic 4,5-dihydrothiophenes via transient cycloadducts that underwent rearrangement under these reaction conditions. Using chiral carbohydrate-derived nitroalkenes, twodiastereomeric dihydrothiophenes were obtained, showing that regiospecificity and facial selectivity were involved in these cycloadditions