Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles
作者:Shashikant U. Dighe、Surya K. Samanta、Shivalinga Kolle、Sanjay Batra
DOI:10.1016/j.tet.2017.03.031
日期:2017.4
iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y1 and Y2. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives
一种有效的碘介导的二甲基亚砜(DMSO)中碘介导的氧化Pictet-Spengler反应,使用末端炔烃作为2-氧醛替代物来合成芳基(9 H-吡啶并[3,4- b ]吲哚-1-基)甲烷酮。描述。该方案的范围包括法西林蛋白酶,大黄素(Eusoditomins)Y 1和Y 2的总合成。该方法扩展了制备吡咯并[1,2- a ]-喹喔啉和吲哚并[1,5- a ]喹喔啉衍生物的方法。1-芳酰基-β-咔啉的实用性通过执行钯催化的β-咔啉直接邻位得到证明-C(sp2)-H使用DMSO作为来源和访问4-芳基-canthin-6-ones的硫代甲基(SMe)基团对苯环的官能化。