1,5-Phosphonium betaines from N-triflylpropiolamides, triphenylphosphane, and active methylene compounds
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DOI: 10.3762/bjoc.15.253
Abstract: N-Phenyl-N-(trifluoromethylsulfonyl)propiolamides react with triphenylphosphane in the presence of various active methylene compounds CH2XY in a 1:1:1 molar ratio to furnish 1-phosphonium-5-oxabetaines, Ph3P+–C(R)=CH–C(O–)=CXY. These betaines are formed preferentially, but not exclusively, as E-diastereoisomers with respect to… read more here.
Keywords: betaines triflylpropiolamides; triflylpropiolamides triphenylphosphane; phosphonium betaines; active methylene ... See more keywords