PHOSPHAALKENE ALS EN-KOMPONENTEN IN (4+2)-CYCLOADDITIONEN.

Article abstract of DOI:10.1016/S0040-4039(00)88176-9

The phosphaalkenes 1 and 3 undergo <4+2> cycloadditions with dimethylbutadiene forming the 1,2,5,6-tetrahydro-λ³-phosphorines 2 and 4.In each case two stereoisomers are obtained, one of which can be converted thermically into the more stable on