2-Azidoallylphosphonates: synthesis and application to formation of 4-amino-2-ethoxy-1,2-oxaphosphol-3-ene 2-oxides
Abstract
2-Azidoallylphosphonates (1) have been synthesised from allenic phosphonates and converted to 2-azirinylmethylphosphonates (2) photochemically; the latter are readily transformed into stable primary enamines, (4-amino-2-ethoxy-1,2-oxaphosphol-3-ene 2-oxides)(confirmed by X-ray crystallography) by warming in the presence of catalytic amounts of PdCl2(PhCN)2.