Addition of secondary amines to alkynylphosphonates
作者:Anna E. Panarina、Alla V. Dogadina、Valentin I. Zakharov、Boris I. Ionin
DOI:10.1016/s0040-4039(01)00711-0
日期:2001.6
Addition of secondaryamines to alkynylphosphonates catalyzed by Cu(I) salts proceeds regio- and stereospecifically to form (E)-2-(dialkylamino)alkenylphosphonates. The E-configuration was proved by analysis of 13C–31P vicinal spin–spin coupling constants in the NMR spectra of the products and authentic model compounds. The 3JPC constants in the model compounds fall in the range of 6–12 Hz for the
Fedorova, G. K.; Anan'eva, L. G.; Yakovchuk, O. A., Journal of general chemistry of the USSR, 1984, vol. 54, # 7, p. 1321 - 1323
作者:Fedorova, G. K.、Anan'eva, L. G.、Yakovchuk, O. A.
DOI:——
日期:——
Addition of Secondary Amines to Alkynephosphonates
作者:A. E. Panarina、A. V. Dogadina、B. I. Ionin
DOI:10.1023/b:rugc.0000018649.77735.cf
日期:2003.11
Addition of secondary amines to diethyl alkynephosphonates, catalyzed by Cu(I) salts, proceeds regio- and stereospecifically and yields diethyl (E)-2-diethylaminooalkenephosphonates. The E configuration was established by analysis of the vicinal coupling constants between the phosphorus and carbon nuclei in the C-13 NMR spectra of the reaction products and model compounds: (3)J(PC) is 6-10 Hz at the cis arrangement of the coupled nuclei and 16 Hz or higher at the trans arrangement. In all the diethyl diethylaminoalkenephosphonates obtained, (3)J(PC) is about 5 Hz, suggesting cis addition.