Highly diastereoselective Barbier allylation and iminium cyclization: a simple entry to bicyclic and tricyclic piperazinones
摘要:
Barbier allylation of 5,6-dihydropyrazin-2(1H)-ones leads to a single isomer of 3 -alylpiperazin-2-ones in high yields. Further Pictet-Spengler-Grieco cyclization of 3-allylpiperazin-2-ones with aldehydes provides bicyclic and tricyclic piperazinones with high diastereoselectivity. (C) 2008 Elsevier Ltd. All rights reserved.
Highly diastereoselective Barbier allylation and iminium cyclization: a simple entry to bicyclic and tricyclic piperazinones
摘要:
Barbier allylation of 5,6-dihydropyrazin-2(1H)-ones leads to a single isomer of 3 -alylpiperazin-2-ones in high yields. Further Pictet-Spengler-Grieco cyclization of 3-allylpiperazin-2-ones with aldehydes provides bicyclic and tricyclic piperazinones with high diastereoselectivity. (C) 2008 Elsevier Ltd. All rights reserved.
Highly diastereoselective Barbier allylation and iminium cyclization: a simple entry to bicyclic and tricyclic piperazinones
作者:A. Viso、R. Fernández de la Pradilla、A. Flores、M.A. del Águila
DOI:10.1016/j.tet.2008.10.034
日期:2008.12
Barbier allylation of 5,6-dihydropyrazin-2(1H)-ones leads to a single isomer of 3 -alylpiperazin-2-ones in high yields. Further Pictet-Spengler-Grieco cyclization of 3-allylpiperazin-2-ones with aldehydes provides bicyclic and tricyclic piperazinones with high diastereoselectivity. (C) 2008 Elsevier Ltd. All rights reserved.