Enantioselective synthesis of α-benzyloxy-ω-alkenals: application to the synthesis of (+)-exo-brevicomin, (+)-iso-exo-brevicomin, and (−)-isolaurepan
摘要:
The enantioselective synthesis of alpha-benzyloxy aldehydes containing a terminal alkene was carried out from chiral Pool L-(+)tartaric acid by employing the stereoselective reduction of a 1,4-diketone as the key step. The synthetic utility of these aldehydes was demonstrated in the synthesis of pine beetle pheromones (+)-exo-brevicomin, (+)-iso-exo-brevicomin and a formal synthesis of 2,7cis-disubstituted oxepane (-)-isolaurepan. (c) 2007 Elsevier Ltd. All rights reserved.
Asymmetric synthesis of both enantiomers of α-methyl-α-methoxyphenylacetic acid from l-(+)-tartaric acid: formal enantioselective synthesis of insect pheromone (−)-frontalin
作者:Kavirayani R. Prasad、Appayee Chandrakumar、Pazhamalai Anbarasan
DOI:10.1016/j.tetasy.2006.07.007
日期:2006.8
Both antipodes of α-methyl-α-methoxyarylacetic acid derivatives were prepared from a common chiralpool precursor l-(+)-tartaricacid. The key step involves the addition of Grignard reagents to 1,4-diketones derived from tartaric acid. The utility of this strategy was applied in the formal enantioselective synthesis of pine beetle pheromone (−)-frontalin.
Asymmetric synthesis of unsaturated α-benzyloxyaldehydes: an enantioselective synthesis of (+)-exo-brevicomin
作者:Kavirayani R. Prasad、Pazhamalai Anbarasan
DOI:10.1016/j.tetasy.2005.10.035
日期:2005.12
Enantioselective synthesis of alpha-hydroxy aldehydes with an alkene tether was accomplished front L-(+)-tartaric acid, employing stereoselective reduction of a 1,4-diketone with L-selectride as the key step. Synthetic utility of these aldehydes was demonstrated in the synthesis of pine beetle pheromone (+)-exo-brevicomin. (c) 2005 Elsevier Ltd. All rights reserved.