A. Felk et al., ENANTIOSELECTIVE MICHAEL-TYPE REACTION OF CHIRAL LINEAR ALPHA,ALPHA-DISUBSTITUTED SECONDARY ENAMINES, Tetrahedron : asymmetry, 5(8), 1994, pp. 1459-1462
The enantioselective Michael-type reaction of chiral 2-substituted cyc
lic imines, reacting as their secondary enamine tautomers, has been ex
tended to a linear ketimine possessing an oxo group on one of the subs
tituents. A single secondary enamine tautomer is observed due to H-bon
ding of the NH group, thus allowing the reaction to proceed with a hig
h degree of stereoselectivity.