Salts of acyl halides and 3, 5-di-tert-butyl-4-hydroxy-N, N-dimethylbenzylamine in benzylation reactions
作者:D. B. Gorbunov、V. V. Ershov、G. A. Nikiforov
DOI:10.1007/bf00698436
日期:1993.3
The interaction of 3, 5-di-tert-butyl-4-hydroxy-N, N-dimethylbenzyiamine with various acylhalides has been studied. The N-acyl quaternary ammonium salts obtained can be used to introduce a sterically hindered phenol fragment into organic compounds containing an active methylene group.
An efficient and simple synthetic approach has been developed for the preparation of biologically interesting spiro[oxindole-3,4'-(4′H-pyran)] derivatives via visible light-mediated one-pot, three-component reaction of isatins, 1,3-dicarbonylcompounds and malononitrile by using an inexpensive organic dye, Na2 eosin Y, as the photocatalyst in aqueous ethyl lactate at ambient temperature. The substrate