M. Amedjkouh et al., SYNTHESIS AND CYCLIZATION OF PHOSPHORYLATED BETA-ALLENIC AMINES, Phosphorus, sulfur and silicon and the related elements, 126, 1997, pp. 53-64
Phosphorylated beta-allenic amines were obtained by aminophosphorylati
on of beta-allenic aldehydes and ketones. When treated by silver tetra
fluoroborate in methylene chloride, they generated phosphorylated nitr
ogen cycles such as 1-pyrrolines and 1.2,3,6-tetrahydropyridines, with
dephosphorylation of the latter tetrahydropyridines producing 3,6-dih
ydropyridines.