Addition of Secondary Amines to Alkynephosphonates
摘要:
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.
Addition of Secondary Amines to Alkynephosphonates
摘要:
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.
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.