名称:
Enantiopure 3-Amino-Substituted 1-Indanones, 1-Tetralones, and 1-Benzosuberones via Friedel–Crafts Cyclisation of ω-Aryl-β-benzamido Acids
摘要:
Conjugate addition of enantiopure lithium (R)-N-benzyl-N-(-methylbenzyl)amide to a range of -aryl-,-unsaturated esters gives the corresponding -aryl--amino esters as single diastereoisomers in high yields. Friedel-Crafts cyclisation of the pendant carbonyl group onto the -aryl ring then gives a range of 3-amino-substituted 1-indanones, 1-tetralones, and 1-benzosuberones, representing an efficient and short protocol for the preparation of these benzo-fused carbocycles in enantiopure form.