Reactions of Difluorocarbene with Organozinc Reagents
作者:Vitalij V. Levin、Artem A. Zemtsov、Marina I. Struchkova、Alexander D. Dilman
DOI:10.1021/ol400122k
日期:2013.2.15
Reactions of difluorocarbene with benzyl and alkylzinc halides leading to fluorinated organozinc species have been described. The generated α-difluorinated organozinc reagents are reasonably stable in solution and can be quenched with external electrophiles (iodine, bromine, proton), affording compounds containing the CF2 fragment.
Benzoyl urea derivatives that are alpha helical peptides mimetics that mimic BH3-only proteins, compositions containing them, their conjugation to cell-targeting-moieties, and their use in the regulation of cell death are disclosed. The benzoyl urea derivatives are capable of binding to and neutralizing pro-survival Bcl-2 proteins. Use of benzoyl urea derivatives in the treatment and/or prophylaxis of diseases or conditions associated with deregulation of cell death are also described.
A variety of ketones have been prepared by a palladium-catalyzed reaction of ethanethiol esters with organozinc reagents. Various functional groups, including esters, ketones, aromatic halides and aldehydes, tolerate the reaction conditions. The reaction can also be applied to the synthesis of α-amino ketones using the corresponding L-α-amino thiol esters without racemization.
Molybdenum-mediated diastereoselective synthesis of 2-heterobicyclo[4.4.0]decene derivatives
作者:Ming-Chang P. Yeh、Chong-Nan Chaung
DOI:10.1039/p19960002167
日期:——
The addition of a variety of functionalizedzinc–copperreagentsRCu(CN)ZnI 2 to (η5-cyclopentadienyl)(η4-cyclohexa-1,3-diene)dicarbonylmolybdenum cation 1 proceeds in a highly regio- and stereo-specific fashion to generate (η5-cyclopentadienyl)(π-allyl)dicarbonylmolybdenum complexes 3 with a functionalized side-chain at the C-4 position of the ring. Intramolecular cyclization of the (π-allyl)molybdenum
The palladium-catalyzed cross-coupling of N-heteroaryl sulfides with organozinc reagents was developed. Scope and limitation of the reaction regarding generality of zinc reagents and substrate were also investigated.