Palladium(II)-catalyzed tandem intramolecular aminopalladation of alkynylanilines and conjugate addition for synthesis of 2,3-disubstituted indole derivatives
作者:Zengming Shen、Xiyan Lu
DOI:10.1016/j.tet.2006.08.086
日期:2006.11
synthesis of 2,3-disubstituted indoles with high selectivity from 2-ethynylaniline derivatives and α,β-unsaturated carbonyl compounds was developed. This Pd(II)-catalyzed reaction involves tandem intramolecular aminopalladation, olefin insertion and protonolysis of the carbon-palladium bond with the regeneration of Pd(II) species in the presence of halide ions.
Construction of Cyclohepta[b]indoles via Platinum-Catalyzed Intermolecular Formal [4+3]-Cycloaddition Reaction of α,β-Unsaturated Carbene Complex Intermediates with Siloxydienes
作者:Nobuharu Iwasawa、Hiroyuki Kusama、Hideyuki Sogo、Kodai Saito、Takuya Suga
DOI:10.1055/s-0033-1338938
日期:——
Platinum(II)-catalyzed intermolecular formal [4+3]-cycloadditionreaction of α,β-unsaturated carbene complex intermediates with siloxydienes proceeded under mild conditions to give cyclohepta[b]indole derivatives in good yield. The reaction was found to proceed via 1,2-alkyl shift of the carbene complex intermediates obtained by [4+2]-cycloadditionreaction of the unsaturated carbenes with dienes.
铂 (II) 催化的 α,β-不饱和卡宾配合物中间体与甲硅烷氧基二烯的分子间形式 [4+3]-环加成反应在温和条件下进行,以良好的收率得到环庚 [b] 吲哚衍生物。发现该反应通过不饱和卡宾与二烯的 [4+2]-环加成反应获得的卡宾配合物中间体的 1,2-烷基转移进行。
Lewis Acid Mediated Vinylogous Additions of Enol Nucleophiles into an α,β-Unsaturated Platinum Carbene
作者:Paul A. Allegretti、Khoi Huynh、Tarik J. Ozumerzifon、Eric M. Ferreira
DOI:10.1021/acs.orglett.5b03246
日期:2016.1.4
A variety of substituted indoles and benzofurans are accessed via a platinum catalyzed annulation and vinylogous addition of enol nudeophiles. Several beta-dicarbonyl compounds participate in the reaction, as do alpha-nitro and alpha-cyano carbonyl species. Subjecting the indole products to acidic conditions results in the formation of fused heterocycles.