C- ARYL GLYCOSID DERIVATIVES, PHARMACEUTICAL COMPOSITION, PREPARATION PROCESS AND USES THEREOF
申请人:SHANGHAI DE NOVO PHARMATECH CO. LTD.
公开号:US20170037038A1
公开(公告)日:2017-02-09
This invention relates to a kind of C-aryl glycoside derivatives, its pharmaceutical compositions, preparation methods, and uses thereof. The preparation method comprises: method 1: in a solvent, deprotecting the acetyl protecting groups of compound 1-f in the presence of a base; method 2: 1) compound 2-g reacts with
via Mitsunobu reaction; 2) deprotecting the acetyl protecting groups of compound 2-f obtained from step 1; method 3: 1) compound 2-g reacts with
via nucleophilic substitution reaction; 2) deprotecting the acetyl protecting groups of compound 3-f obtained from step 1. The pharmaceutical composition comprises a kind of C-aryl glycoside derivatives; it's pharmaceutically acceptable salts and/or prodrugs thereof and excipient thereof. This invention further relates to a kind of C-aryl glycoside derivatives, it's pharmaceutically acceptable salts or pharmaceutical compositions thereof for the use in preparation of a SGLT inhibitor. The C-aryl glycoside derivatives of this invention provides a new direction for the study of SGLT inhibitors.
The aim of this research was to discover α2-receptor antagonist subtypes that are more selective than known compounds. We focused on rigid molecules possessing a benzo-fused bicyclo[3.2.0]heptane skeleton. The synthetic route used relied upon the intramolecular [2+2] cycloaddition of styrylketene precursors. The cycloaddition was remarkably efficient and delivered multigram quantities of the cycloadduct
Process for the preparation of substituted vinylbenzyl chloride
申请人:Rohm and Haas Company
公开号:US03962357A1
公开(公告)日:1976-06-08
An improved continous single step vapor phase process for the preparation of substituted vinylbenzyl chloride from substituted ethyltoluene is disclosed. In this process a substituted ethyltoluene is reacted with a halogen gas in the vapor phase, at elevated temperatures via a continuous feed process. Furthermore, this process achieves halogenation followed by dehydrohalogenation in a single pass through the reactor. There is also obtained a very high total selectivity to vinylbenzyl chloride and its precursors via this continuous process.
Copolymers which are the direct reaction product of isoolefin having from 4 to 7 carbon atoms and para-alkylstyrene and which have substantially homogeneous compositional distillation are disclosed. These copolymers are preferably copolymers of isobutylene and para-methylstyrene, and preferably at least about 95 wt. % of the copolymer has a para alkylstyrene content within about 10 wt. % of the average para-alkylstyrene content for the overall composition, and even more preferably the normalized differential refractive index and ultraviolet curves obtained by gel permeation chromatography for these copolymers are essentially superimposeable. These copolymers can also be halogenated, and in a particularly preferred aspect of the invention selectively brominated polymers are provided, with almost exclusive substitution taking place on the para-alkyl group, so as to yield a highly desirable benzylic halogen, and preferably bromine, functionality. Methods for producing these copolymers and halogenated copolymers are also disclosed.
A halogenated butyl rubber is prepared by a process wherein a monomer charge comprising isobutylene, and a conjugated diolefin having the formula
wherein Ri, R2 and R3 which may be the same or different are a methyl group or a hydrogen atom and X is bromine or chlorine together with a initiator having the formula
wherein each R4 is an alkyl, aryl or aralkyl group, Y is preferably an alkoxy, hydroxy, peroxy ester or halide, and n is a positive whole number are introduced into a suitable reaction vessel in a specified ratio at a temperature of from about -90 to -10°C, a solution of a Lewis acid is added and the monomers are copolymerized at said temperature to form said halogenated butyl rubber, and the halogenated rubber is recovered from solution.