The <i>ortho</i>-substituent on 2,4-bis(trifluoromethyl)phenylboronic acid catalyzed dehydrative condensation between carboxylic acids and amines
作者:Ke Wang、Yanhui Lu、Kazuaki Ishihara
DOI:10.1039/c8cc02558d
日期:——
2,4-Bis(trifluoromethyl)phenylboronic acid is a highly effective catalyst for dehydrative amidation between carboxylic acids and amines. Mechanistic studies suggest that a 2 : 2 mixed anhydride is expected to be the only active species, and the ortho-substituent of boronic acid plays a key role in preventing the coordination of amines to the boron atom of the active species, thus accelerating the amidation
Effect of N-Trifluoroacetyl Derivatives of Amino Acids and Amino Acid Analogs on Microbial Antitumor Screen
作者:Theodore T. Otani、Mary R. Briley
DOI:10.1002/jps.2600680428
日期:1979.4
Eighteen trifluoroacetyl derivatives of aminoacids and of aminoacidanalogs were prepared and tested for growth-inhibitory activity using a Lactobacillus casei system as a prescreen for antitumor activity. Of the compounds tested, the trifluoroacetyl derivatives of o-, m-, and p-fluorophenylalanine and of beta-3-thienylalanine showed modest activity; trifluoroacetyl derivatives of phenylalanine and of
[EN] PRODRUGS OF KETAMINE, COMPOSITIONS AND USES THEREOF<br/>[FR] PROMÉDICAMENTS À BASE DE KÉTAMINE, COMPOSITIONS ET UTILISATIONS DE CEUX-CI
申请人:XW LAB INC
公开号:WO2019137381A1
公开(公告)日:2019-07-18
Provided are prodrugs of (S) -or (R) -ketamine, including isotopically labeled ketamine,composition and uses thereof. Compounds having formula (Ia) or (Ib) as the prodrugs of (S) -or (R) -ketamine, including isotopically labeled ketamine, and pharmaceutical compositions comprising the compounds provided herein are used for treating or preventing a CNS disease.More particularly, the related diseases include depression and pain. (Ia) (Ib)
Direct, visible light-sensitized benzylic C H fluorination of peptides using dibenzosuberenone: selectivity for phenylalanine-like residues
作者:Desta Doro Bume、Cody Ross Pitts、Rayyan Trebonias Jokhai、Thomas Lectka
DOI:10.1016/j.tet.2016.08.018
日期:2016.10
A visible light-sensitized benzylic sp3 CH fluorination protocol using dibenzosuberenone (5 mol %) and Selectfluor® is optimized for the direct functionalization of phenylalanine-like residues in short chain peptides. Amino acids, dipeptides, and tripeptides undergo benzylic fluorination with remarkable regioselectivity in the presence of protected basic, acidic, and nonpolar side chains (including
This invention is directed to oxoazaheterocycyl compounds which inhibit Factor Xa, to oxoazaheterocycyl compounds which inhibit both Factor Xa and Factor IIa, to pharmaceutical compositions comprising these compounds, to intermediates useful for preparing these compounds, to a method of directly inhibiting Factor Xa and to a method of simultaneously directly inhibiting Factor Xa and Factor IIa..