Facile Synthesis of δ-Amino-β-ketoesters and Piperidinediones via a Vinylogous Mannich-Type Reaction of Brassard-Type Diene with Aldimines without Catalyst
摘要:
The vinylogous Mannich reaction of N-tosyl-aldimines with Brassard diene proceeds at room temperature under catalyst-free conditions smoothly to give gamma-amino-beta-ketoesters (4b-l) in good to excellent yields, which are easily converted to piperidinediones at higher temperature. The two-step reactions could be combined in a one-pot process with toluene as a solvent and without the use of any catalyst for direct synthesis of piperidinediones (5).
Facile Synthesis of δ-Amino-β-ketoesters and Piperidinediones via a Vinylogous Mannich-Type Reaction of Brassard-Type Diene with Aldimines without Catalyst
摘要:
The vinylogous Mannich reaction of N-tosyl-aldimines with Brassard diene proceeds at room temperature under catalyst-free conditions smoothly to give gamma-amino-beta-ketoesters (4b-l) in good to excellent yields, which are easily converted to piperidinediones at higher temperature. The two-step reactions could be combined in a one-pot process with toluene as a solvent and without the use of any catalyst for direct synthesis of piperidinediones (5).
Facile Synthesis of <font>δ</font>-Amino-<font>β</font>-ketoesters and Piperidinediones via a Vinylogous Mannich-Type Reaction of Brassard-Type Diene with Aldimines without Catalyst
作者:Chun-Ling Gu、Li Liu、Dong Wang、Yong-Jun Chen
DOI:10.1080/00397910902730846
日期:2009.7.21
The vinylogous Mannich reaction of N-tosyl-aldimines with Brassard diene proceeds at room temperature under catalyst-free conditions smoothly to give gamma-amino-beta-ketoesters (4b-l) in good to excellent yields, which are easily converted to piperidinediones at higher temperature. The two-step reactions could be combined in a one-pot process with toluene as a solvent and without the use of any catalyst for direct synthesis of piperidinediones (5).