Copper-Catalyzed Diamination of Unactivated Alkenes With Electron-Rich Amino Sources
作者:Yang Li、Arshad Ali、Junchao Dong、Yu Zhang、Lili Shi、Qun Liu、Junkai Fu
DOI:10.1021/acs.orglett.1c01313
日期:2021.5.21
The catalytic intermoleculardiamination of unactivated alkenes with electron-rich amino sources is a challenge. Herein, by employing a directing-group strategy, a copper-catalyzeddiamination of unactivated alkenes was realized. Symmetrical diamines were efficiently produced in a highly diastereoselective manner with readily available dialkylamines as amino sources, while a one-pot and two-step operation
INTERMEDIATES OF SITAGLIPTIN AND PREPARATION PROCESS THEREOF
申请人:Pan Xianhua
公开号:US20130281695A1
公开(公告)日:2013-10-24
Disclosed are intermediates of Sitagliptin, a preparation process thereof, and a process for synthesizing Sitagliptin using these intermediates. Sitagliptin is synthesized by using chiral amino compounds as a raw material, without having to build a chiral center with a chiral asymmetric catalytic hydrogenation, and high-pressure hydrogenation is avoided.
In connection with the development of new potential 5-HT1A ligands, multistep synthesis of N-substituted-3-aminomethyl-2,3-dihydro-1,4-dioxinol[2,3-b]pyridine derivatives as ORG13514 analogs are described. Their biological activity as 5-HT1A type ligands is reported and compared with ORG13514 affinity and selectivity for 5-HT1A receptors. (C) 1999 Elsevier Science S.A. All rights reserved.
Selective<i>O</i>-Benzylation of Aminoalkanols
作者:X. Eric Hu、John M. Cassady
DOI:10.1080/00397919508013428
日期:1995.3
A simple and one-step method has been developed for selective O-benzylation of aminoalkanols. Study of steric effects shows the best selectivity in adjacent 1 degrees-OH vs 2 degrees-CHNH2 and decreased selectivity in 2 degrees-OH vs 1 degrees-CH2NH2 and non adjacen aminoalkanol.