N -Tosyl-3,3-dipropyl-4-vinylpyrrolidine衍生物3a – c是通过自由基环化反应从修饰的Baylis–Hillman加合物2合成的。所需的起始原料2a – c通过以下三个步骤从Baylis–Hillman加合物以中等收率制备:(i)Baylis–Hillman加合物的乙酰化;(ii)S N 2'与甲苯磺酰胺反应制备1,和(iii )用1,4-二溴-2-丁烯进行烷基化。
N -Tosyl-3,3-dipropyl-4-vinylpyrrolidine衍生物3a – c是通过自由基环化反应从修饰的Baylis–Hillman加合物2合成的。所需的起始原料2a – c通过以下三个步骤从Baylis–Hillman加合物以中等收率制备:(i)Baylis–Hillman加合物的乙酰化;(ii)S N 2'与甲苯磺酰胺反应制备1,和(iii )用1,4-二溴-2-丁烯进行烷基化。
Synthesis of N-tosyl-3,3,4-trisubstituted pyrrolidine derivatives starting from the Baylis–Hillman adducts via radical cyclization
作者:Hyun Seung Lee、Hoo Sook Kim、Jeong Mi Kim、Jae Nyoung Kim
DOI:10.1016/j.tet.2008.01.001
日期:2008.3
N-Tosyl-3,3-disubstituted-4-vinylpyrrolidine derivatives 3a–c were synthesized via radical cyclizationfrom the modified Baylis–Hillman adducts 2. The required starting materials 2a–c were prepared in moderate yields from the Baylis–Hillman adducts in three steps: (i) acetylation of the Baylis–Hillman adducts, (ii) SN2′ reaction with tosylamide to prepare 1, and (iii) alkylation with 1,4-dibromo-2-butene
N -Tosyl-3,3-dipropyl-4-vinylpyrrolidine衍生物3a – c是通过自由基环化反应从修饰的Baylis–Hillman加合物2合成的。所需的起始原料2a – c通过以下三个步骤从Baylis–Hillman加合物以中等收率制备:(i)Baylis–Hillman加合物的乙酰化;(ii)S N 2'与甲苯磺酰胺反应制备1,和(iii )用1,4-二溴-2-丁烯进行烷基化。