Regio- and diastereoselective SN2′ or SN2″ reactions on chiral acetals of cyclic aldehydes promoted by PhCu, BF3
摘要:
The regio- and diastereoselectivity of the addition of PhCu, BF3 reagent on chiral acetals derived from several mono or dienic aldehydes was studied. It as found that monoethylenic acetals react regio- and diastercoselectively via Lin overall anti S(N)2' reaction. The regioselectivity observed with the dienic acetals seems to be strongly dependent on the nature of the acetal. In all cases the S(N)2'' reaction was the result of an anti process. (C) 2001 Elsevier Science Ltd. All rights reserved.
Regio- and diastereoselective SN2′ or SN2″ reactions on chiral acetals of cyclic aldehydes promoted by PhCu, BF3
摘要:
The regio- and diastereoselectivity of the addition of PhCu, BF3 reagent on chiral acetals derived from several mono or dienic aldehydes was studied. It as found that monoethylenic acetals react regio- and diastercoselectively via Lin overall anti S(N)2' reaction. The regioselectivity observed with the dienic acetals seems to be strongly dependent on the nature of the acetal. In all cases the S(N)2'' reaction was the result of an anti process. (C) 2001 Elsevier Science Ltd. All rights reserved.