PREPARATION AND SYNTHETIC APPLICATION OF DIETHYL 2-OXO-1,1-DIFLUOROPHOSPHONATES
作者:Hou-Jen Tsai
DOI:10.1080/10426509708043514
日期:1997.3.1
Abstract Reaction of diethyl(bromodifluoromethyl)phosphonate (EtO)2P(O)CF2Br 1 with activated zinc gave [(diethoxyphosphonyl)difluoromethyl]zinc bromide (EtO)2P(O)CF2ZnBr 2, which was acylated with various acylating agents to afford diethyl 2-oxo-1,1-difluorophosphonates (EtO)2P(O)CF2C(O)R 4 in good yields. Treatment of phosphonates 4 such as diethyl 2-oxo-1,1-difluoropropylphosphonate (EtO)2P(O)CF2C(O)CH3
EVERETT, T. S.;PURRINGTON, S. T.;BUMGARDNER, C. L., J. ORG. CHEM., 1984, 49, N 20, 3702-3706
作者:EVERETT, T. S.、PURRINGTON, S. T.、BUMGARDNER, C. L.
DOI:——
日期:——
Synthesis of β,β-difluoroacrylates
作者:Carl L. Bumgardner、Jason P. Burgess、T.Stephen Everett、Suzanne T. Purrington
DOI:10.1016/s0022-1139(00)81101-x
日期:1992.2
Diethyl malonates substituted in the alpha-position by an alkyl group may be bromodifluoromethylated to give derivatives suitable for conversion to beta,beta-difluoro-alpha-alkylacrylates. The final step involves dealkoxycarbonylation-elimination promoted by potassium bromide in dimethyl sulfoxide.