Synthetic Studies toward the Preparation of Phosphonate Analogs of Sphingomyelin and Ceramide 1-Phosphate Using Pentacovalent Organophospholene Methodology
作者:Cynthia K. McClure、Pranab K. Mishra、Christopher W. Grote
DOI:10.1021/jo962144v
日期:1997.4.1
pentacovalent oxaphospholene 3b (derived from methyl vinyl ketone and triethylphosphite) readily condensed with dialkyl azodicarboxylates (R = Et, t-Bu, CH(2)CCl(3)) to form beta-hydrazido gamma-ketophosphonates 5 and 8 in excellent yields. Cleavage of the N-N bond in 5a (R = Et) or 5b (R = t-Bu) via standard methods was unsuccessful. Upon reduction with NaBH(4), 8 produced the oxazolidinone 9 (93%) as a diastereomeric