Enantioselective Synthesis of 2-Arylbicyclo[1.1.0]butane Carboxylates
作者:Changming Qin、Huw M. L. Davies
DOI:10.1021/ol303217s
日期:2013.1.18
catalyst and catalyst loading to form either 2-arylbicyclo[1.1.0]butane carboxylates or cyclohexene derivatives. Both products are produced in a highly diastereoselective manner, with 2-arylbicyclo[1.1.0]butane carboxylates preferentially formed under low catalyst loadings. When the reaction is catalyzed by Rh2(R-BTPCP)4, the 2-arylbicyclo[1.1.0]butane carboxylates are generated with high levels of asymmetric
One-Pot Synthesis of Difluorobicyclo[1.1.1]pentanes from α-Allyldiazoacetates
作者:Jack C. Sharland、Huw M. L. Davies
DOI:10.1021/acs.orglett.3c01664
日期:2023.7.21
1]pentanes is enabled from an α-allyldiazoacetate precursor in a one-pot process through cyclopropanation to afford a 3-aryl bicyclo[1.1.0]butane, followed by reaction with difluorocarbene in the same reaction flask. The modular synthesis of these diazo compounds affords novel 2,2-difluorobicyclo[1.1.1]pentanes that were inaccessible through previously reported methods. The reactions of chiral 2-arylbicyclo[1
Reaction of bis(Sym-Collidine)-Bromine(I) Hexafluorophosphate with α-Diazo Esters
作者:Gérard Rousseau、Jean-Xavier Marie
DOI:10.1080/00397919908086009
日期:1999.11
Reaction of alpha-diazo esters with bis(sym-collidine)bromine(I) hexafluorophosphate in methylene chloride at -40 degrees C led to alpha-bromo-alpha,beta-unsaturated esters.
Construction of All-Carbon Quaternary Centers through Cu-Catalyzed Sequential Carbene Migratory Insertion and Nucleophilic Substitution/Michael Addition
作者:Chengpeng Wang、Fei Ye、Chenggui Wu、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.5b01592
日期:2015.9.4
cross-coupling reaction of terminal alkyne, α-diazo ester, and alkyl halide has been developed. This transformation involves sequent migratory insertion of copper-carbene and nucleophilic substitution, in which a C(sp)–C(sp3) bond and a C(sp3)–C(sp3) bond are formed successively on a carbenic center. Michael addition acceptors can also be employed instead of alkyl halides that enable Michael addition to