Synthesis of Pyridylsulfonium Salts and Their Application in the Formation of Functionalized Bipyridines
作者:Vincent K. Duong、Alexandra M. Horan、Eoghan M. McGarrigle
DOI:10.1021/acs.orglett.0c03048
日期:2020.11.6
arylation of pyridylsulfides with good functional group tolerance was developed. To demonstrate synthetic utility, the resulting pyridylsulfonium salts were used in a scalable transition-metal-free coupling protocol, yielding functionalizedbipyridines with extensive functional group tolerance. This modular methodology permits selective introduction of functional groups from commercially available pyridyl
[EN] HEPATITIS C VIRUS INHIBITORS<br/>[FR] INHIBITEURS DU VIRUS DE L'HEPATITE C
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2003099274A1
公开(公告)日:2003-12-04
Hepatitis C virus inhibitors are disclosed having the general formula:(I) wherein R1, R2, R3, R', B, Y and X are described in the description. Compositions comprising the compounds and methods for using the compounds toinhibit HCV are also disclosed.
Organocatalytic Synthesis of Methylene-Bridged <i>N</i>-Heterobiaryls
作者:David E. Stephens、Vu T. Nguyen、Bhuwan Chhetri、Emily R. Clark、Hadi D. Arman、Oleg V. Larionov
DOI:10.1021/acs.orglett.6b02719
日期:2016.11.18
N-heterobiaryls directly from the corresponding N-heterocycles in a reaction with methylmagnesium chloride in the presence of catalytic amounts of N,N,N′,N′-tetramethylethylenediamine under thermal and microwave conditions is reported. The split-and-merge methylenation of 2,2′-N-heterobiaryls and the direct ortho-alkylation of quinoline and isoquinoline with Grignardreagents have also been developed
as Lewis base catalysts are reported. Lewis bases containing the 3,5-bis(trifluoromethyl)phenyl group were found to be significantly more enantioselective for a wider range of substrates than those bearing aromatic residues that are not strongly electron-deficient in the allylation of aldehydes with allyltrichlorosilane. Also, optically pure 3,3′-dibromo-1,1′-biisoquinoline N,N′-dioxide that has not