Cp*Rh(III)-Catalyzed Low Temperature C–H Allylation of N-Aryl-trichloro Acetimidamide
作者:Suvankar Debbarma、Sourav Sekhar Bera、Modhu Sudan Maji
DOI:10.1021/acs.joc.6b02150
日期:2016.12.2
directing group for the directed C–H-allylation reactions. Depending on the allylatingagent used, selectively either mono- or diallylated products were readily synthesized. Moreover, the trichloro acetimidamide directing group was found to be highly efficient even at lower temperature for the C–H-allylation reaction. Due to mildness of the reaction conditions, double bond isomerization or cyclization
bearing a phenylurea moiety was applied to enantioselective bromoaminocyclization reactions of 2-allylaniline derivatives, which provide opticallyactive 2-substituted indoline products as important motifs for biologically active compounds. A protecting group on the nitrogen of the 2-allylaniline substrate was carefully optimized, and highly enantioselective reactions were achieved by employing the
A novel approach to the synthesis of indoline derivatives is presented. The key cyclization step features the phenyliodine(III) bis(trifluoroacetate)- (PIFA-) mediated formation of a N-acylnitrenium ion and its succeeding intramolecular trapping by the olefin fragment. In addition, difunctionalization of the alkene moiety is achieved since the in situ generation of an additional hydroxy group at the