Reactions of 5H-1,2λ5-Azaphospholes with Arylazocarbonitriles and Dialkyl Acetylenedicarboxylates

Article abstract of DOI:10.1002/hlca.19900730711

Azaphosholes 1a-c react with activated arylazocarbonitriles to 1,5,2λ⁵-diazaphosphorines 2a-c and 3a-c.The reaction of 1a-c with diethyl or dimethyl acetylenedicarboxylates yields 7H-1,4λ⁵-azaphosphepines 4a-c.The structures of 2b, 3a, and 4a are established by an X-ray diffraction analysis.