Preparation and use of enantioenriched 2-aryl-propylsulfonylbenzene derivatives as valuable building blocks for the enantioselective synthesis of bisabolane sesquiterpenes
摘要:
We have demonstrated that different enantioenriched 2-arylpropylsufonylbenzene derivatives are very useful building blocks for the synthesis of aromatic bisabolane sesquiterpenes. Their preparation and the exploitation of their chemical reactivity have been comprehensively investigated. Accordingly, the naturally occurring bisabolane sesquiterpenes (-)-curcuphenol, (-)-xanthorrhizol, (+)-glandulone A, (+)-curcudiol, (+)-turmerone and (+)-curcudiol-10-one were synthesized in high enantiomeric purity. It is worth noting that the compounds (+)-curcudiol-10-one and (+)-glandulone A were prepared in enantioenriched form for the first time. Through the proposed synthetic approaches, we were able to confirm both chemical structures and the absolute configurations previously assigned to the two aforementioned sesquiterpenes. (C) 2014 Elsevier Ltd. All rights reserved.
Optically active (all-E,2R,2′R)-oscillol (= (all-E,2R,2′R)-3,4,3′,4′-tetradehydro-1,2,1′,2′-tetrahydro-ψ,ψ-carotene-1,2,1′,2′-tetrol; 1) was synthesized according to the C10 + C20 + C10 = C40 strategy, applying the Wittig reaction to couple the synthons 4 and 6. The chiral centre was introduced by a Sharpless dihydroxylation of 3-methylbut-2-enyl 4-nitrobenzoate (8).
光学活性的(清一色ë,2 - [R,2' - [R)-oscillol(=(清一色ë,2 - [R,2' - [R)-3,4,3',4'-四脱氢1,2,1',根据C 10 + C 20 + C 10 = C 40策略合成2'-tetrahydro-ψ,ψ-胡萝卜素-1,2,1',2'-tetrol; 1),采用Wittig反应偶联合成子4和6。通过3-甲基丁-2-烯基4-硝基苯甲酸酯的无尖锐的二羟基化作用引入手性中心(8)。
Aspects of nitrile oxide cycloaddition stereoselectivity: Chemistry of 4-cyano-2,2-dimethyl- and 4-cyano-2,2,5,5-tetramethyl-1,3-dioxolane oxides. X-ray structure of (4 , 5)-4,5-bismethoxy-carbonyl-3-[(4)-2,2,5,5-tetramethyl-1,3-dioxolan-4-yl]-Δ2-isox-azoline
作者:Richard H. Jones、Gareth C. Robinson、Eric J. Thomas
DOI:10.1016/0040-4020(84)85117-0
日期:1984.1
4-Cyano-2,2-dimethl- and 4-cyano-2,2,5,5-tetramethyl-1,3-dioxolane oxìdes (1) and (2) were generated from the corresponding chloro-oximes, and trapped by addition to styrene, dimethyl maleate, dimethyl fumarate, and cyclopentene. The additions to styrene and dimethyl fumarate gave 1 : 1 mixtures of diastereoisomeric adducts. However some stereoselectivity was detected in the additions to the -1,2-disubstituted
Pyridin-2-YL-Amino-1, 2, 4-Thiadiazole Derivatives as Glucokinase Activators for the Treatment of Diabetes Mellitus
申请人:Aicher Thomas Daniel
公开号:US20100204240A1
公开(公告)日:2010-08-12
Provided are compounds of Formula (I): wherein R
2
, R
3
, R
13
, L and D
2
are as defined in the specification, which are useful in the treatment and/or prevention of diseases or disorders mediated by deficient levels of glucokinase activity or which can be treated by activating glucokinase including, but not limited to, diabetes mellitus, impaired glucose tolerance, IFG (impaired fasting glucose) and IFG (impaired fasting glycemia), as well as other diseases and disorders such as those discussed herein.
Pyridin-2YL-Amino-1, 2, 4-Thiadiazole Derivatives as Glucokinase Activators for the Treatment of Diabetes Mellitus
申请人:AICHER Thomas Daniel
公开号:US20120277242A1
公开(公告)日:2012-11-01
Provided are compounds of Formula (I): wherein R
2
, R
3
, R
13
, L and D
2
are as defined in the specification, which are useful in the treatment and/or prevention of diseases or disorders mediated by deficient levels of glucokinase activity or which can be treated by activating glucokinase including, but not limited to, diabetes mellitus, impaired glucose tolerance, IFG (impaired fasting glucose) and IFG (impaired fasting glycemia), as well as other diseases and disorders such as those discussed herein.
INTERMEDIATES FOR THE PREPARATION OF PYRIDIN-2-YL-AMINO-1,2,4-THIADIAZOLE DERIVATIVES
申请人:Array BioPharma Inc.
公开号:US20150057448A1
公开(公告)日:2015-02-26
Provided are intermediates having the formulas
wherein R
2
, R
3
, and L are as defined in the specification, which are useful in the preparation of pyridin-2-yl-amino-1,2,4-thiadiazole derivatives.