Tandem conjugate addition. Aldol reactions employing 9-(phenylseleno)-9-borabicyclononane: a novel method for effecting formal aldol condensations at the .alpha.-carbon of .alpha.,.beta.-unsaturated ketones
The Friedel-Crafts reaction of a wide variety of arenes and heteroarenes was accomplished, in good to excellent yields (50-98%) and with high alpha -regioselectivity, using Morita-Baylis-Hillman acetates. Functionalized conjugated enones were obtained under Bi(OTf)(3) catalysis (10 mol%) in dichloroethane (DCE) at 50 degrees C. (C) 2020 Elsevier Ltd. All rights reserved.
LEONARD, W. R.;LIVINHOUSE, T., J. ORG. CHEM., 1985, 50, N 5, 730-732