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Polarizedketenedithioacetalsl,(XY)C=C(SR)2(X,Y=CN,NO2,COOEt,CONH=,R=alkyl,benzyl).havebeenextensivelyusedasbuildingblocksinorganicsynthesisespeciallyinthepreparationofheterocycliccompounds’’’.Inanextensionofourrecentstudies’intheapplicationofketokete...