We describe an unprecedented dual C-H functionalization of indolin-2-one via an oxidative C(sp3)-H/N-H/X-H (X = N, C, S) cross-coupling protocol, which is catalyzed by a simple iron salt under mild and ligand-free conditions and employs air (molecular oxygen) as the terminal oxidant. This method is readily applicable for the construction of tetrasubstituted carbon centers from methylenes and provides
Sulfamic acid as energy efficient catalyst for synthesis of flurophores, 1-H-spiro [isoindoline-1,2′-quinazoline]-3,4′(3′H)-diones
作者:MANSING M MANE、DATTAPRASAD M PORE
DOI:10.1007/s12039-016-1047-7
日期:2016.4
An energy efficient synthesis of 1-H-spiro[isoindoline-1,2 ′-quinazoline]-3,4 ′(3 ′ H)-diones has been expediently accomplished by a reaction of isatin(s) / cyclic ketone and anthranilamide in ethanol at ambient temprature. Excellent yields of the products in short time duration, operational simplicity, and simple work-up procedure are the attractive features of the present protocol. Synthesized 1
β-Cyclodextrin Mediated Multicomponent Synthesis of
Spiroindole Derivatives in Aqueous Medium
作者:Vishwa Deepak Tripathi
DOI:10.14233/ajchem.2020.22311
日期:2020.1.15
An efficient β-cyclodextrin catalyzed multicomponent synthetic protocol has been developed for the synthesis of spiro[indoline-3,2'-quinazoline]-2,4'(3’H)-dione from isatoic anhydride, isatin and primary amine in aqueous medium. This methodology offers a convenient method for the synthesis of spiroindole quinazolines in excellent yields. To extend synthetic utility of protocol some dihydro quinazolines