Antithyroid Drug Carbimazole and Its Analogues: Synthesis and Inhibition of Peroxidase-Catalyzed Iodination of l-Tyrosine
摘要:
Synthesis and biological activity of the antithyroid drug carbimazole (CBZ) and its analogues are described. The introduction of an ethoxycarbonyl group in methimazole and its selenium analogue not only prevents the oxidation to the corresponding disulfide and diselenide but also reduces the zwitterionic character. A structure-activity correlation in a series of CBZ analogues suggests that the presence of a methyl substituent in CBZ and related compounds is important for their antithyroid activity.
Iodine-promoted direct thiolation (selenylation) of imidazole with disulfides (diselenide): A convenient and metal-free protocol for the synthesis of 2-arylthio(seleno)imidazole
作者:Rongnan Yi、Sen Liu、Hongxia Gao、Zhiwu Liang、Xinhua Xu、Ningbo Li
DOI:10.1016/j.tet.2020.130951
日期:2020.2
A convenient and metal-free protocol for the synthesis of 2-arylthio(seleno)imidazoles from imidazoles and disulfides (diselenides) was developed through the direct thiolation (selenylation) of imidazoles promoted by 0.5 equiv. of iodine. This process is scalable and tolerates a wide spectrum of disulfides (diselenides) to deliver products in high yields. Compared with previous methods, this protocol
Anti-Thyroid Drugs and Thyroid Hormone Synthesis: Effect of Methimazole Derivatives on Peroxidase-Catalyzed Reactions
作者:Gouriprasanna Roy、G. Mugesh
DOI:10.1021/ja054497u
日期:2005.11.1
moiety is important for the LPO inhibition. The kinetic and mechanisticstudies reveal that MSeI inhibits the LPO activity by reducing the H(2)O(2), providing a novel method to reversibly inhibit the enzyme. Although MSeI strongly inhibits LPO, the enzyme's activity can be completely recovered by increasing the H(2)O(2) concentration. On the other hand, the inhibition by methimazole (MMI), the sulfur
Studies on the Reactive Species in Fluoride-Mediated Carbon−Carbon Bond-Forming Reactions: Carbanion Formation by Desilylation with Fluoride and Enolates
作者:Margaret M. Biddle、Hans J. Reich
DOI:10.1021/jo0522409
日期:2006.5.1
bond-forming reactions was investigated. The regio- and diastereoselectivities of silanes reacting with cyclohexenone in the presence of a catalytic amount of fluoride was compared to the reactivity of analogous solvent-separated lithium ion pairs. Closely analogous behavior was observed, showing that carbanions and not siliconate complexes are the reactive species in the fluoride-catalyzed reactions. Spectroscopic
Preparation of 5-Substituted 2-Mercapto-1-methylimidazoles. Direct Metalation of 2-Mercapto-1-methylimidazole
作者:Brian T. Phillips、David A. Claremon、Sandor L. Varga
DOI:10.1055/s-1990-27007
日期:——
2-Mercapto-1-methylimidazole (1) is directly metalated with tert- butyllithium in tetrahydrofuran to give the 5, S-dianion 2. Reaction of the dianion 2 with a series of electrophiles gives regioselectively 5-substituted 2-mercapto-1-methylimidazoles 4, 5 and 7.
Singh, Paramjit; Aggarwal, Sunil K.; Sarin, Rakesh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1985, vol. 24, p. 263 - 265