A compound having the general structure of Formula (I):
or a pharmaceutically acceptable salt, solvate, or ester thereof, is useful in treating diseases, disorders, or conditions such as obesity, metabolic disorders, addiction, diseases of the central nervous system, cardiovascular disorders, respiratory disorders, and gastrointestinal disorders.
Rhodium-Catalyzed Synthesis of Eight-Membered Rings
作者:Brenton DeBoef、W. Richard Counts、Scott R. Gilbertson
DOI:10.1021/jo0620462
日期:2007.2.1
Experiments to develop a rhodiumcatalyst for the [4 + 2 + 2] cycloisomerization of dienynes with a second alkyne are described. The generality of the reaction is probed in terms of dienyne structure and alkyne structure. A catalystsystem that provides cyclooctatrienes in greater than 70% yield is reported. Several experiments to determine the nature of the catalyst are described.
Fe-Catalyzed Three-Component Coupling Reaction of α,β,γ,δ-Unsaturated Carbonyl Compounds and Conjugate Dienes with Alkylsilyl Peroxides and Nucleophiles
An Fe(OTf)2-catalyzed three-component coupling reaction of α,β,γ,δ-unsaturated carbonylcompounds with alkylsilyl peroxides in the presence of certain heteronucleophiles (ROH and indole) is realized under mild reaction conditions. A variety of α,β,γ,δ-diene carbonyl substrates with different substituents were successfully employable via combination with several different alkylsilyl peroxides. This
Stereochemistry of the Horner-Emmons reaction between 3-functionally substituted 2-methyl-2-propenylphosphonates and aliphatic aldehydes. 4. Effect of the nature of the aliphatic aldehyde and concentration of the starting reagents
作者:G. V. Kryshtal'、�. P. Serebryakov、L. M. Suslova、L. A. Yanovskaya
DOI:10.1007/bf00962399
日期:1990.6
The double bond formed in the Horner-Emmons reaction has only E configuration independently of the structure of the saturated linear, alpha-branched, and beta-branched aliphatic aldehydes upon their reaction with the diethyl ester of 3-ethoxycarbonyl-2-methyl-2-propenylphosphonic acid, while the ratio of the 2E, 4E and 2Z,4E isomers in the reaction product varies only from 58:42 to 62:38. An increase in the aldehyde concentration leads to an increase in the fraction of the 2Z,4E isomer in the ethyl ester of 2E/Z,4E-3,7-dimethyl-2,4-octadienoic acid formed.
Cross metathesis of β-carotene with electron-deficient dienes. A direct route to retinoids
作者:Agnieszka Wojtkielewicz、Jadwiga Maj、Jacek W. Morzycki
DOI:10.1016/j.tetlet.2009.06.032
日期:2009.8
Cross metathesis (CM) reactions of beta-carotene and alkenes occur regioselectively in the presence of the Hoveyda second generation catalyst. Scission of the C15-C15' and C11-C12 bonds of P-carotene in all CM reactions predominates. The reaction with ethyl (2E,4E/Z)-3-methylhexa-2,4-dienoate is both regio and diastereoselective, and affords ethyl all-trans-retinoate as the major product, if suitable CM conditions are applied. (C) 2009 Elsevier Ltd. All rights reserved.