Vitamin D3: synthesis of seco C-9,11,21-trisnor-17-methyl-1α, 25-dihydroxyvitamin D3 analogues
摘要:
The synthesis and biological activities of seco C-9,11,21-trisnor-17-methyl-1alpha,25-dihydroxyvitamin D-3 analogues (D-ring analogues) are described. (C) 2002 Elsevier Science Ltd. All rights reserved.
[EN] VITAMIN D3 ANALOGUES FOR THE PREVENTION AND TREATMENT OF BONE DISORDERS [FR] ANALOGUES DE LA VITAMINE D3 POUR LA PREVENTION ET POUR LE TRAITEMENT DE TROUBLES OSSEUX
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