Reductive Synthesis of Aminal Radicals for Carbon–Carbon Bond Formation
作者:David A. Schiedler、Yi Lu、Christopher M. Beaudry
DOI:10.1021/ol500024q
日期:2014.2.21
Aminal radicals were generated by reduction of the corresponding amidine or amidinium ion. The intermediate radicals participate in C–C bond-forming reactions to produce fully substituted aminal stereocenters. No toxic additives or reagents are required. More than 30 substrate combinations are reported, and chemical yields are as high as 99%.
The development of carbon–carbon bond forming reactions of aminal radicals
作者:David A. Schiedler、Jessica K. Vellucci、Yi Lu、Christopher M. Beaudry
DOI:10.1016/j.tet.2014.12.067
日期:2015.3
Aminal radicals were generated and used in synthetic reactions for the first time. Aminal radicals are formed from aminals by radical translocation using AIBN and a stoichiometric hydrogen atom donor, or by SmI2 reduction of N-acyl amidines or amidinium ions in the presence of a proton source. Aminal radicals were found to participate in inter- and intramolecular C–C bondformingreactions with electron
A Manganese-promoted direct oxidative C−P bond formation between 2-pyridones and secondary phosphine oxides has been developed. The reported protocol proceeds under mild reaction conditions, and the C3-phosphinoylation is proposed to take place under a radical process in the presence of substoichiometric amount of Mn(II).
The ortho-directed palladium-catalyzeddirect C–H arylation of 3-picolinylpyrimidin-4-one was achieved by using various arylhalides. The method was extended to C–H arylation of pyrimidin-4-ones containing a methoxy group and an aryl group at the C5 site. The 2-cyanoethyl substituent was also evaluated as an ortho-directing group. The method gives access to novel N-substituted 2-aryl or 2,5-diaryl
An efficient and regioselective N-alkylation of 4(3H)-pyrimidone with various electrophiles in the presence of Fe nano particle is reported. The catalyst initiates N-alkylation of amides by alkyl chlorides. The reaction of equimolar 4(3H)-pyrimidone and 2-chloro-3-(chloromethyl)quinolines in the presence of KOH and Fe nano particle (5 mol %) m DMSO solution under reflux condition formed 3-[(2-chloroquinolin-3-yl]methyppyrimiclin-4(3H)ones. (C) 2010 Elsevier Ltd. All rights reserved.