Glycerol as a promoting medium for electrophilic activation of aldehydes: catalyst-free synthesis of di(indolyl)methanes, xanthene-1,8(2H)-diones and 1-oxo-hexahydroxanthenes
β-cyclodextrin hydrate has been investigated towards the eco-compatible synthesis of bis-(indolyl)methanes in aqueous medium by the chemoselective reaction of indoles with differently substituted aryl and alkyl aldehydes under mild reaction conditions. The catalytic attributes of β-cyclodextrin hydrate were also demonstrated through molecular docking and DFT studies. Reactions were slower in D2O than in H2O
The Lewis acid–surfactant–SiO2-combined (LASSC) nanocatalyst synthesizes BIMs, and has the advantages of being non-toxic, multi-cycle, highly stable and efficient.
Copper-catalyzed multicomponent reactions for the efficient synthesis of diverse spirotetrahydrocarbazoles
作者:Shao-Cong Zhan、Ren-Jie Fang、Jing Sun、Chao-Guo Yan
DOI:10.3762/bjoc.18.80
日期:——
diverse spirotetrahydrocarbazoles. This reaction is an important development of the Levy reaction by using 2-methylindole to replace ethyl indole-2-acetate and successfully provides facileaccess to important polysubstituted spiro[carbazole-3,3'-indolines], spiro[carbazole-2,3'-indolines], spiro[carbazole-3,5'-pyrimidines] and spiro[carbazole-3,1'-cycloalkanes] in satisfactory yields and with high diastereoselectivity
在硫酸铜存在下,2-甲基吲哚、芳香醛和各种环状亲双烯体在回流甲苯中的三组分或四组分反应得到多种螺四氢咔唑。该反应是利用 2-甲基吲哚代替吲哚-2-乙酸乙酯的 Levy 反应的重要发展,并成功地提供了获得重要的多取代螺[咔唑-3,3'-二氢吲哚]、螺[咔唑-2,3 '-二氢吲哚]、螺[咔唑-3,5'-嘧啶]和螺[咔唑-3,1'-环烷烃],收率令人满意,非对映选择性高。