Stereoselective synthesis of 5-alkyliden-6-aminotetrahydro-2-pyranones through an unexpected isomerization of the hydroxytetrahydro-2-pyridinones obtained by the selective reduction of acylated enaminones
摘要:
A convenient methodology for the stereoselective preparation of 5-alkyliden-6-aminotetrahydro-2-pyranone 4 is reported. The synthesis of 2-pyranone 4 occurs through an unknown isomerization mechanism of the hydroxytetrahydro-2-pyridinone 3, an accessible starling material obtained by mild and selective reduction of the 5-acyltetrahydro-2-pyridinone 2. The isomerization mechanism and the stereoselectivity in the synthesis of 2-pyranone 4 was investigated and rationalized. (C) 1997 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of 5-alkyliden-6-aminotetrahydro-2-pyranones through an unexpected isomerization of the hydroxytetrahydro-2-pyridinones obtained by the selective reduction of acylated enaminones
摘要:
A convenient methodology for the stereoselective preparation of 5-alkyliden-6-aminotetrahydro-2-pyranone 4 is reported. The synthesis of 2-pyranone 4 occurs through an unknown isomerization mechanism of the hydroxytetrahydro-2-pyridinone 3, an accessible starling material obtained by mild and selective reduction of the 5-acyltetrahydro-2-pyridinone 2. The isomerization mechanism and the stereoselectivity in the synthesis of 2-pyranone 4 was investigated and rationalized. (C) 1997 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of 5-alkyliden-6-aminotetrahydro-2-pyranones through an unexpected isomerization of the hydroxytetrahydro-2-pyridinones obtained by the selective reduction of acylated enaminones
作者:Cristina Cimarelli、Gianni Palmieri
DOI:10.1016/s0040-4020(97)10333-7
日期:1998.1
A convenient methodology for the stereoselective preparation of 5-alkyliden-6-aminotetrahydro-2-pyranone 4 is reported. The synthesis of 2-pyranone 4 occurs through an unknown isomerization mechanism of the hydroxytetrahydro-2-pyridinone 3, an accessible starling material obtained by mild and selective reduction of the 5-acyltetrahydro-2-pyridinone 2. The isomerization mechanism and the stereoselectivity in the synthesis of 2-pyranone 4 was investigated and rationalized. (C) 1997 Elsevier Science Ltd. All rights reserved.