An m-CPBA-mediated intramolecular epoxidation-decarboxylative alkoxylation cascade reaction of olefinic oxamic acids has been developed.
已开发出一种由m-CPBA介导的内分子环氧化-脱羧烷氧化级联反应,用于烯烃羧酰胺酸的合成。
Ionic Diamine Rhodium Complex Catalyzed Reductive N-Heterocyclization of 2-Nitrovinylarenes
作者:Kazumi Okuro、Joanna Gurnham、Howard Alper
DOI:10.1021/jo200320k
日期:2011.6.3
Ionic diamine rhodiumcomplex (1) catalyzes the reductive N-cyclization of 2-vinylnitroarenes using carbon monoxide as a reducing agent to afford functionalized indoles. The catalytic system allows direct access to indoles with ester and ketone groups at the 2- or 3-position, in good yields.
The metalcarbonyls Fe(CO)5˙ Ru3(CO)12, and Rh6(CO)16 are catalysts for the deoxygenation of ortho-nitrostyrenes under carbonmonoxide pressure to give indole derivatives; the crystal structure of a non-catalytically active rhodium complex obtained during the synthesis of (5e) is reported.
Herein, an unprecedented non-noble-metal-catalyzed oxidation/cyclization of ene-ynamides is developed, allowing the synthesis of diversely functionalized lactams in moderate to good yields with excellent diastereoselectivities without the observation of typical cyclopropanation products. In combination with Ellman’s tert-butylsulfinimine chemistry, chiral γ-lactams containing three contiguous stereocenters
Domino Aryne Annulation via a Nucleophilic–Ene Process
作者:Hai Xu、Jia He、Jiarong Shi、Liang Tan、Dachuan Qiu、Xiaohua Luo、Yang Li
DOI:10.1021/jacs.8b01005
日期:2018.3.14
1,2-Benzdiyne equivalents possess the unique property that they can react with two arynophiles through iteratively generated 1,2- and 2,3-aryne intermediates. Upon rational modification on the second leaving group of these aryne precursors, a domino aryne annulation approach was developed through a nucleophilic-ene reaction sequence. Various benzo-fused N-heterocyclic frameworks were achievable under transition metal-free conditions with a broad substrate scope.