NMR studies on [2+3] cycloaddition of nitrile oxides to cyclohexene derivatives
摘要:
Site selectivity, regioselectivity and stereoselectivity of [2+3] cycloaddition of 4-trifluoromethylbenzonitrile oxide to cyclohexene carboxylates substituted with alkenyl functions were examined. Site selectivity was correlated with electron charges of alkenyl carbon atoms. Structure of the products has been established by an extensive application of 2D H-1 and C-13 NMR spectroscopy and electrospray ionization mass spectrometry. (C) 2013 Elsevier B.V. All rights reserved.
Chemo and Enantioselective Butadiene-functionalized Dienes Cyclodimerization catalyzed by Nickel Complexes
作者:M ElAmrani
DOI:10.1016/00404-0399(50)09356-
日期:1995.7.10
Chiral aminophosphine-phosphinite and diphosphine ligands induce chirality during nickel catalyzed cyclodimerization of conjugated dienic esters with butadiene. The enantiomeric excesses of the cyclodimers are determined by chiral GLC and NMR methods.
RODRIGUEZ, J.;BRUN, P.;WAEGELL, B., J. ORGANOMET. CHEM., 359,(1989) N, C. 343-369