Efficient syntheses of functionalized piperidines through extremely regioselective Rh-catalyzed cyclohydrocarbonylation of amido-ω,ω′-dienes
摘要:
The highly regioselective cyclohydrocarbonylation of 4-amido-1,6-heptadienes catalyzed by Rh-BIPHEPHOS complex gives functionalized piperidines quantitatively, which serve as versatile intermediates for the syntheses of a variety of piperidine and quinolizidine alkaloids. Reaction of 3-Boc-amino-1,5-hexadiene affords the corresponding dehydropiperidine-aldehyde exclusively via site and regioselective hydroformylation. Possible mechanisms for these reactions are proposed. (C) 1998 Elsevier Science Ltd. All rights reserved.
Efficient syntheses of functionalized piperidines through extremely regioselective Rh-catalyzed cyclohydrocarbonylation of amido-ω,ω′-dienes
摘要:
The highly regioselective cyclohydrocarbonylation of 4-amido-1,6-heptadienes catalyzed by Rh-BIPHEPHOS complex gives functionalized piperidines quantitatively, which serve as versatile intermediates for the syntheses of a variety of piperidine and quinolizidine alkaloids. Reaction of 3-Boc-amino-1,5-hexadiene affords the corresponding dehydropiperidine-aldehyde exclusively via site and regioselective hydroformylation. Possible mechanisms for these reactions are proposed. (C) 1998 Elsevier Science Ltd. All rights reserved.