Visible photocatalysis of novel oxime phosphonates: synthesis of β-aminophosphonates
作者:Yong-Hong Li、Chun-Hai Wang、Su-Qian Gao、Feng-Ming Qi、Shang-Dong Yang
DOI:10.1039/c9cc06075h
日期:——
A novel type of oxime phosphonate was synthesized and used in the intermolecular cascade radical addition reaction of alkenes to access β-aminophosphonates via visible-light-driven N-centered iminyl radical-mediated and redox-neutral selective C–P single-bond cleavage in an active phosphorus radical route. The procedure is characterized by its ability to achieve the construction of Csp3–P and Csp3–N
Reduction of dialkyl 1-(hydroxyimino)alkyl(aryl)phosphonate 1 with borane-pyridine complex proceeds smoothly to give dialkyl 1-(hydroxyamino) alkyl(or aryl)phosphonate 2 which is then easily converted into the corresponding hydroxyaminophosphonic acid 3 by acidic hydrolysis.