Site-Selective Aliphatic C–H Chlorination Using <i>N</i>-Chloroamides Enables a Synthesis of Chlorolissoclimide
作者:Ryan K. Quinn、Zef A. Könst、Sharon E. Michalak、Yvonne Schmidt、Anne R. Szklarski、Alex R. Flores、Sangkil Nam、David A. Horne、Christopher D. Vanderwal、Erik J. Alexanian
DOI:10.1021/jacs.5b12308
日期:2016.1.20
functionalization of aliphatic C-H bonds remain a paramount goal of organic synthesis. Free radical alkane chlorination is an important industrial process for the production of small molecule chloroalkanes from simple hydrocarbons, yet applications to fine chemical synthesis are rare. Herein, we report a site-selective chlorination of aliphatic C-H bonds using readily available N-chloroamides and apply this transformation
Direct Decarboxylative Functionalization of Carboxylic Acids via O–H Hydrogen Atom Transfer
作者:Christina G. Na、Davide Ravelli、Erik J. Alexanian
DOI:10.1021/jacs.9b10825
日期:2020.1.8
Decarboxylative functionalization via hydrogen atom transfer offers an attractive alternative to standard redox approaches to this important class of transformations. Herein, we report a direct decarboxylative functionalization of aliphatic carboxylicacidsusing N-xanthylamides. The unique reactivity of amidylradicals in hydrogen atom transfer enables decarboxylative xanthylation under redox-neutral
THE 1-BUTYL-2-HYDROXYARALKYL PIPERAZINE DERIVATIVES AND THE USES AS ANTI-DEPRESSION MEDICINE THEREOF
申请人:Li Jianqi
公开号:US20110183996A1
公开(公告)日:2011-07-28
The invention discloses 1-butyl-2-hydroxyl aralkyl piperazine derivatives and their use as antidepressants. The derivatives of the present invention have triple inhibition effect on the reuptake of 5-HT, NA and DA, and can be administrated to the patients in need thereof in form of composition by route of oral administration, injection and the like. Compared with clinically currently used dual targets antidepressants (such as venlafaxine), said derivatives may have stronger antidepression effect, broader indications, faster onset and lower neurotoxicity and side reaction; and said derivatives have stronger antidepression activity, lower toxicity, higher bioavailability, longer half life and better druggablity, compared with aryl alkanol piperazine derivatives and optical isomers thereof disclosed in prior art. The 1-butyl-2-hydroxyl aralkyl piperazine derivative is the free alkali or its salt of a compound of formula below:
Substituent Effects on Regioselective Intramolecular Oxidation of Unactivated C−H Bonds: Stereoselective Synthesis of Substituted Tetrahydropyrans
作者:Man-Kin Wong、Nga-Wai Chung、Lan He、Dan Yang
DOI:10.1021/ja028357l
日期:2003.1.1
Our previously reported intramolecular delta-selective C-H bond oxidation by dioxiranes, generated in situ from activated ketones, offers a novel approach to the synthesis of tetrahydropyrans. To synthesize substituted tetrahydropyrans in a stereoselective manner, we examined the effects of alkyl, nitrogen, and oxygen substituents at the alpha-, beta-, and gamma-sites of ketones on the stereoselectivities
Cobalt-Catalyzed Decarboxylative Acetoxylation of Amino Acids and Arylacetic Acids
作者:Kun Xu、Zhiqiang Wang、Jinjin Zhang、Lintao Yu、Jiajing Tan
DOI:10.1021/acs.orglett.5b02142
日期:2015.9.18
The first cobalt-catalyzed decarboxylative acetoxylation reaction was accomplished. This methodology is applicable to a wide range of amino acids and arylaceticacids.