Regiospecific and diastereoselective aldol reaction of chiral N-sulfinyl metalloenamines with α,β-unsaturated trifluoromethyl ketones: Asymmetric synthesis of tertiary trifluoromethyl allylic carbinols

Add time:07/14/2019    Source:sciencedirect.com

Regiospecific and diastereoselective aldol type reaction of chiral N-sulfinyl metalloenamines with α,β-unsaturated trifluoromethyl ketones was reported, which affords the corresponding tertiary trifluoromethyl allylic carbinols in high yields with good diastereoselectivities (dr up to 90:10). The reduction of the condensation product 3a with LiBHEt3 and Catecholborane provides CF3-substituted syn- and anti-1,3-amino alcohols 5a and 5b in high yields with excellent diastereoselectivities (dr > 99:1).

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