STUDIES TOWARDS A NEW ONE-POT HETEROCYCLIZATION - BU(T)OK-PROMOTED OXA-MICHAEL AND AZA-MICHAEL ADDITION-INTRAMOLECULAR CARBOCYCLIZATION OF PROP-2-YNYL ALCOHOLS AND AMINES WITH ALPHA,BETA-DISUBSTITUTED NITROALKENES
E. Dumez et al., STUDIES TOWARDS A NEW ONE-POT HETEROCYCLIZATION - BU(T)OK-PROMOTED OXA-MICHAEL AND AZA-MICHAEL ADDITION-INTRAMOLECULAR CARBOCYCLIZATION OF PROP-2-YNYL ALCOHOLS AND AMINES WITH ALPHA,BETA-DISUBSTITUTED NITROALKENES, Chemical communications, (19), 1997, pp. 1831-1832
(BuOK)-O-t-promoted reaction of prop-2-ynyl alcohols 5 or N-methylprop
-2-ynylamine 12 with nitroalkenes 1-4 affords 3-methylenetetrahydrofur
ans 6-9 and 3,4-dihydropyrans 10 and 11 or 3-methylenepyrrolidines 13-
16, respectively, in moderate to good yields, with total allylic 1,3-s
train-controlled diastereoselectivity.