p-Selective (sp2)-C-H functionalization of electron rich arenes have been achieved for acylation and alkylation reaction, respectively, with acyl/alkylselenides by organic photoredox catalysis involving interesting mechanistic pathway.
protocol for the synthesis of sterically hinderedketones that proceeds via palladium-catalyzed Suzuki–Miyaura cross-coupling of unconventional amide electrophiles by selective N–C(O) activation. Mechanistic studies demonstrate that steric bulk on the amide has a major impact, which is opposite to the traditional Suzuki–Miyaura cross-coupling of sterically hindered aryl halides. Structural and computational
A Phosphine-Free Manganese Catalyst Enables Stereoselective Synthesis of (1 + <i>n</i>)-Membered Cycloalkanes from Methyl Ketones and 1,<i>n</i>-Diols
作者:Akash Jana、Kuhali Das、Abhishek Kundu、Pradip Ramdas Thorve、Debashis Adhikari、Biplab Maji
DOI:10.1021/acscatal.9b05567
日期:2020.2.21
Herein, we report the stereoselective synthesis of (1 + n)-membered cycloalkane from methyl ketone and 1,n-diol. A manganese(I) complex bearing a phosphine-free ligand catalyzed the reaction, which involved the formation of two C–C bonds via a sequence of intermolecular- and intramolecular-borrowing hydrogenation reactions. It produces 2 mol of water as the sole byproduct, making the process atom economical
cycloheptane rings were constructed from substituted 1,4-butanediol, 1,5-pentanediol, and 1,6-hexanediol, and sterically hindered ketones following a (4 + 1), (5 + 1), and (6 + 1) strategy, respectively. This reaction provides an atom economic methodology to construct two C-Cbonds at a single carbon center generating high-value cycloalkanes from readily available alcohols as feedstock using an earth-abundant
A phosphine-free iron complex-catalyzed synthesis of cycloalkanes <i>via</i> the borrowing hydrogen strategy
作者:Léo Bettoni、Sylvain Gaillard、Jean-Luc Renaud
DOI:10.1039/d0cc05840h
日期:——
Herein we report a diaminocyclopentadienone iron tricarbonylcomplex catalyzed synthesis of substituted cyclopentane, cyclohexane and cycloheptane compoundsusing the borrowing hydrogen strategy in the presence of various substituted primary and secondary 1,n diols as alkylating reagents. Deuterium labeling experiments confirm that the diols were the hydride source in this cascade process.