Ir(III)-Catalyzed C–H Functionalization of Triphenylphosphine Oxide toward 3-Aryl Oxindoles
作者:Qin-Xin Lou、Yuan Niu、Zhi-Chao Qi、Shang-Dong Yang
DOI:10.1021/acs.joc.0c00999
日期:2020.11.20
With triphenylphosphineoxide serving as both the directing group and the reagent, we have developed a Cp*Ir(III)-catalyzed direct C–H functionalization of triphenylphosphineoxide with 3-diazooxindoles to afford a range of 3-(2-(diphenylphosphoryl)phenyl)indolin-2-one derivatives in moderate to excellent yields. The title products are potentially important building blocks for organic synthesis through
Enantioselective trapping of oxonium ylide intermediates by N -benzhydryl- α -imino ester: Synthesis of β -tetrasubstituted α -amino acids
作者:Shi-Kun Jia、Yu-Bing Lei、Long-Long Song、Shun-Ying Liu、Wen-Hao Hu
DOI:10.1016/j.cclet.2016.06.053
日期:2017.2
Abstract A synergistic rhodium(II)/phosphoric acid catalyzed three component reaction of 3-diazooxindoles, alcohols and N-benzhydryl-α-imino ester is developed for the efficient construction of chiral β-alkoxy Cβ-tetrasubstituted α-aminoacid derivatives in good yields and with excellent diastereoselectivities and high enantioselectivities. The synthetic application of the resulting products was illustrated
Facile regiospecific intermolecular C-H insertion reactions of cyclic rhodium carbenoids have been achieved using diazo carbonyl compounds 1 and indole or N-substituted indoles to afford 1,3-dihydro-1'H-[3,3']biindolyl-2-ones, 3a-o in an excellent yield.
BF<sub>3</sub>·OEt<sub>2</sub> catalyzed decarbonylative arylation/C–H functionalization of diazoamides with arylaldehydes: synthesis of substituted 3-aryloxindoles
作者:Sengodagounder Muthusamy、Ammasi Prabu
DOI:10.1039/d2ob00003b
日期:——
A metal-free BF3·OEt2 catalyzed direct decarbonylative arylation of diazoamides with readily accessible aryl aldehydesunder an open-air atmosphere was developed to afford 3-aryloxindoles via 1,2-aryl migration with high selectivity. The reaction offers an efficient pathway for 3-arylation of diazoamides under relatively mildconditions, which shows a high level of functional group tolerance of both