Concise synthesis of 6-sulfonylated 3,4-dihydro-2<i>h</i>-thiopyrans and 7-sulfonylated 3,4,5,6-tetrahydrothiepines from lactols
作者:John K. Gallos、Constantinos C. Dellios
DOI:10.1002/jhet.5570380304
日期:2001.5
A concise method for the synthesis of the title compounds has been developed, which involves condensation of lactols with methylthiomethyl p-tolyl sulfone, followed by mesylation and further cyclisation of the elimination products by refluxing with excess of sodium iodide in dimethyl formamide (DMF).