2-Cyano-.DELTA.3-piperideines. 12. Stereochemistry of formation of N-benzyl-2-cyano-.DELTA.3-piperideines and facile isomerization on alumina to 2-cyano-.DELTA.4-piperideines. A potentially general route to the synthesis of 2,6-disubstituted piperidine alkaloids
2-Cyano-.DELTA.3-piperideines. 12. Stereochemistry of formation of N-benzyl-2-cyano-.DELTA.3-piperideines and facile isomerization on alumina to 2-cyano-.DELTA.4-piperideines. A potentially general route to the synthesis of 2,6-disubstituted piperidine alkaloids
作者:Martine Bonin、Jose Ricardo Romero、David S. Grierson、Henri Philippe Husson
DOI:10.1021/jo00187a018
日期:1984.6
2-Cyano Δ3 piperideines VIII : Biomimetic approach to the synthesis of the decahydroquinoline ring system of poison-dart frog toxins
A biomimeticapproach towards the synthesis of pumiliotoxin C has been developed. The key transformation of enamine equivalent 8 to 9 was catalyzed by contact with alumina. Cyclized intermediate 9 was then reduced stereospecifically to the trans decahydroquinoline 11 or stereoselectively to the cis compound 12.