Asymmetric Michael additions of Grignard reagents to cinnamamides deriving from N-alkyl (R)-(−)-2-aminobutan-1-ol
作者:Joe¨l Touet、Sylvie Baudouin、Eric Brown
DOI:10.1016/s0957-4166(00)82287-9
日期:1992.5
Reaction of cinnamoyl chloride with various N-alkyl derivatives of (R)-(−)-2-aminobutan-1-ol (a readily available reagent) afforded the corresponding cinnamamides. Michael additions of Grignard reagents to the latter, followed by acidic hydrolysis, yielded optically active β-phenylalkanoic acids whose ee most generally were in the range 72–100%.
肉桂酰氯与(R)-(-)-2-氨基丁丹-1-醇的各种N-烷基衍生物(一种容易获得的试剂)反应,得到相应的肉桂酰胺。在后者的Michael加Grignard试剂后,进行酸水解,得到旋光性的β-苯基链烷酸,其ee最普遍在72-100%的范围内。