Pd-Catalyzed C–H Carbonylation of (Hetero)arenes with Formates and Intramolecular Dehydrogenative Coupling: A Shortcut to Indolo[3,2-c]coumarins
摘要:
An efficient protocol for the synthesis of (hetero)aryl carboxylic esters has been achieved by Pd-catalyzed CH carbonylation of (hetero)arenes with aryl formates. A relatively wide range of functional groups can be tolerated in this transformation, and the corresponding esters are obtained in good yields. On this basis, an intramolecular oxidative CH/CH coupling has been developed to prepare indolo[3,2-c]coumarins.
carbonylation reactions. However, there are no catalytic synthetic procedures for their preparation. In this manuscript, we developed a convenient palladium‐catalyzed procedure for the synthesis of aryl formates. Good yields were achieved undermild reaction conditions with formic acid as the formyl source.
Structure-reactivity correlations for reactions of substituted phenolate anions with acetate and formate esters
作者:Dimitrios Stefanidis、Sayeon Cho、Sirano Dhe-Paganon、William P. Jencks
DOI:10.1021/ja00058a006
日期:1993.3
substituted phenolate anions with m-nitrophenyl, p-nitrophenyl, and 3,4-dinitrophenyl formates follow nonlinear BrOnsted-type correlations that might be taken as evidence for a change in the rate-limiting step of a reaction that proceeds through a tetrahedral addition intermediate. However, the correlation actually represents two different BrOnsted lines that are defined by meta- and para-substituted phenolate
The present invention provides compounds capable of binding to an Fc receptor and modulating Fc receptor activity comprising a core lipophilic group in the form of an Aryl zing substituted with a group rich in p-electrons. The invention further provides for a method of treating an autoimmune disease involving Fc receptor activity using such compounds. A method for obtaining a compound which modulates Fc receptor activity is also provided, the method comprising: (a) providing or designing compounds having structural characteristics to fit in the groove of the FcγRIIa structure; and (b) screening the compounds for modulating activity on the Fc receptor.
[EN] ESTER COMPOUND, PREPARATION METHOD AND APPLICATION THEREOF<br/>[FR] ESTER, PROCÉDÉ DE PRÉPARATION ET APPLICATION
申请人:SHANGHAI INST PHARM INDUSTRY
公开号:WO2012145899A1
公开(公告)日:2012-11-01
Compounds of the formula (I) or pharmaceutically acceptable salts thereof are disclosed. In the formula (I), R1, R2, R3, R4, R5 and n are defined as the specification. The preparation method for the compounds of the formula (I), the composition containing the compounds and the use of the compounds in preparing medicaments for regulating blood fat and preventing and treating biliary calculus are disclosed. The compounds of the formula (I) are stable in vitro, have good dissolubility in pharmaceutically applied organic solvents, and have good bioavailability in vivo.