用RhCl [(R,R)-TsDPEN](C 5 Me 5)催化的甲酸/三乙胺共沸混合物将代表性的苯并呋喃基α-磺酰氧基酮和N-保护的α-氨基酮进行不对称转移氢化,得到了相应的1,2-二醇单磺酸盐和N-取代的β-氨基醇,收率高,对映选择性高达99%。还描述了还原产物向具有伯胺基的手性苯并呋喃基β-氨基醇的转化。
Provision of a prophylactic or therapeutic agent for diabetes, which has superior efficacy.
A compound represented by the formula:
wherein each symbol is as described in the specification, or a salt thereof.
Provision of a prophylactic or therapeutic agent for diabetes, which has superior efficacy.
A compound represented by the formula:
wherein each symbol is as described in the specification, or a salt thereof.
提供一种预防或治疗糖尿病的药物,其疗效优异。该化合物的表示式为:其中每个符号如说明书所述,或其盐。
WO2020069625A5
申请人:——
公开号:WO2020069625A5
公开(公告)日:2022-10-11
Enantioselective reduction of benzofuryl halomethyl ketones: asymmetric synthesis of (R)-bufuralol
Enantioselective reduction of representative 2-(bromoacetyl)- and 2-(chloroacetyl)benzofurans with (-)-B-chloro-diisopinocampheylborane and by transfer hydrogenation with formic acid/triethylamine in the presence of RhCl[R,R-TsD-PEN](C5Me5) is described. Transfer hydrogenation of the chloro ketones produced the corresponding chlorohydrins of >= 95% ee. (R)-Bufuralol of 96% ce was prepared from the corresponding chloro ketone by transfer hydrogenation-substitution. (c) 2005 Elsevier Ltd. All rights reserved.
Convenient synthesis and antimicrobial evaluation of some novel 2-substituted-3-methylbenzofuran derivatives
作者:Hatem A. Abdel-Aziz、Amal A.I. Mekawey、Kamal M. Dawood
DOI:10.1016/j.ejmech.2009.02.020
日期:2009.9
The reaction of 3-methylbenzofuran-2-carbohydrazide (1) with 1-phenyl-2-bromoethanone (2a) or 2-chloro-1-(4-chlorophenyl)ethanone (2b) afforded (Z)-1,2-di[(3-methylbenzofuran-2-carbohydrazido]-1-arylethenes Sa and 5b, respectively. Single crystal X-ray analyses of compound 5a proved that the reaction proceeds in 2:1 molar ratio and ruled out the other possible structures 1,3,4-oxadiazine derivative 6 or E-isomer 7. Furthermore, both of 3-(3-methylbenzofuran-2-yl)-3-oxopropanenitrile (9) and 3-methyl-2-benzofuranoyl chloride (15) were used as starting materials for the synthesis of several compounds, such as pyrazoles 10 and 14, oxime 11, hydrazones 12a, b and 3,1-bezoxazine 19. The newly synthesized compounds were tested for their antimicrobial activity against five fungal species and four bacterial species also their minimum inhibitory concentration (MIC) against most of test organisms was performed. Some of these compounds exhibited a significant antimicrobial activity. (C) 2009 Elsevier Masson SAS. All rights reserved.