An efficient and convenient synthesis of chiral enephosphonic acid derivatives (enephosphonates, enephosphonamides, enephosphinates) was reported by a two-step procedure involving alkylidenediphosphorylation of nucleophiles followed by a Horner-Emmons olefination. Depending on the selected strategy, the synthesis could be executed according to a one-pot or a two-step reaction sequence. Regioselectivity of Horner-Emmons reaction and P-31-NMR study of diphosphorylated anions were described. (C) 2002 Elsevier Science B.V. All rights reserved.
机构:
Yuncheng Univ, Dept Appl Chem, Yuncheng 044000, Shanxi, Peoples R ChinaYuncheng Univ, Dept Appl Chem, Yuncheng 044000, Shanxi, Peoples R China
Li Hui
Yin Liang
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机构:
Chinese Acad Sci, Shanghai Inst Organ Chem, CAS Key Lab Synthet Chem Nat Subst, Shanghai 200032, Peoples R ChinaYuncheng Univ, Dept Appl Chem, Yuncheng 044000, Shanxi, Peoples R China