Cobalt-catalyzed cyclization of benzamides with alkynes: a facile route to isoquinolones with hydrogen evolution
作者:Ramasamy Manoharan、Masilamani Jeganmohan
DOI:10.1039/c8ob01924j
日期:——
benzamides with alkynes assisted by an 8-aminoquinoline ligand in the presence of Co(OAc)2·4H2O and pivalicacid under an air atmosphere provided isoquinolone derivatives in good to excellent yields. In this reaction, the active Co(III) species is regenerated by the reaction of Co(I) species with pivalicacid under an air atmosphere with hydrogen evolution. The proposed mechanism was supported by competition
Transition metal catalyzed decarbonylation offers a distinct synthetic strategy for new chemical bond formation. However, the π‐backbonding between CO π* orbitals and metal center d‐orbitals impedes ligand dissociation to regenerate the catalyst under mild reaction conditions. Developed here is visible light induced rhodium catalysis for decarbonylativecoupling of imides with alkynes under ambient
Benchtop Delivery of Ni(cod)<sub>2</sub> using Paraffin Capsules
作者:Jacob E. Dander、Nicholas A. Weires、Neil K. Garg
DOI:10.1021/acs.orglett.6b01758
日期:2016.8.5
A facile method that allows for Ni(cod)(2) to be used on the benchtop is reported. The procedure involves the preparation of paraffin Ni(cod)(2) capsules, which are stable to air and moisture. It is demonstrated that these readily available capsules can be used to promote a range of Ni(cod)(2)-catalyzed transformations. These studies are expected to promote the further use of Ni(cod)(2) in organic synthesis.