Synthesis of Polyfunctionalized 1-Aminobuta-1,3-dienes by Addition of Dimethyl Acetylenedicarboxylate to (Z)-β-Enamino-λ5-Phosphazenes. Configurational and Conformational Analysis Based on NOE Data, nJPX Coupling Constant,

Article abstract of DOI:10.1021/jo00087a010

DMAD adds regioselectively to N-acyl-(Z)-β-enaminophosphazenes through the β position with high stereoselectivity.The stereochemistry and conformation of the products 2 and 4 in solution have been elucidated based upon NOE experiments and ⁿJ