The Pd-catalyzed cross-coupling ethoxycarbonylation of aryl boronic acids with N-aryl-α-iminoesters affords aryl carboxylic esters via carbonyl-imino Ï bond cleavage. This unprecedented mode of reaction allows regioselective installation of the ethoxycarbonyl group into target molecules. Mechanism studies have revealed that an unusual 1,2-aryl shift process is involved in the transformation.
Indium-assisted aluminium-based stereoselective allylation of prostereogenic α,α-disubstituted cycloalkanones and imines
作者:Chennakesava Reddy、Srinivasarao Arulananda Babu、Nayyar Ahmad Aslam
DOI:10.1039/c4ra04293j
日期:——
Al0 for the allylation of a variety of prostereogenic α,α-disubstituted (hindered) cycloalkanones, 1,2-dione-based systems and various imino systems (CN functional groups) is reported. The stereoselective InCl3-catalyzed Al-based allylation of various 2-substituted-2-carbethoxycycloalkanones gave the corresponding products with moderate to excellent diastereoselectivity. The allylation and propargylation
Indium-Mediated Addition of γ-Substituted Allylic Halides to N-Aryl α-Imino Esters: Diastereoselective Production of β,β′-Disubstituted α-Amino Acid Derivatives with Two Contiguous Stereocenters
作者:Nayyar Ahmad Aslam、Vadla Rajkumar、Chennakesava Reddy、Makoto Yasuda、Akio Baba、Srinivasarao Arulananda Babu
DOI:10.1002/ejoc.201200254
日期:2012.8
γ-substituted allylic halides to N-aryl (including N-PMP) α-imino- and N-acylhydrazono esters and highly diastereoselective tailoring of functionalized γ,δ-unsaturated β,β′-disubstituted N-aryl α-amino acid derivatives, bearing two contiguous stereocenters is reported. Further N-allylation of the resulting γ,δ-unsaturated β,β′-disubstituted N-aryl amino acid derivatives followed by ringclosingmetathesis (RCM)
Polarity-Reversed Addition of Enol Ethers to Imines under Visible Light: Redox-Neutral Access to Azide-Containing Amino Acids
作者:Sen Yang、Shuangyu Zhu、Dengfu Lu、Yuefa Gong
DOI:10.1021/acs.orglett.9b03238
日期:2019.10.18
established for the construction of γ-azido aminoacids under visiblelight. This transformation features mild and redox-neutral conditions, affording a series of amino esters with excellent chemoselectivity. Preliminary mechanistic studies revealed that the addition of an oxyalkyl radical to imine is likely the rate-determining step. The obtained azido-containing amino esters could be successfully converted