Microwave-assisted Synthesis of 2-Substituted Naphtho[1,2-d][1,3]oxazoles by Reacting
1-Nitroso-2-naphthol with Allyl Bromides and Benzyl Bromides using FeCl3 as Catalyst
作者:N. Aljaar、S.M. Fraihat、A. Alothman、N.A. Khalaf
DOI:10.14233/ajchem.2020.22745
日期:——
Efficient and improved preparation of 2-substituted[1,2-d][1,3]oxazoles by the reaction of 1-nitroso-2-naphthol and allylbromides, benzylbromides under microwave condition utilizing FeCl3 as a catalyst with yield ranging from 32% to 72%. Reaction with bromo acetonitrile yields the corresponding 2-cyanonaphthoxazole with 58% yield.
Reaction of 1-Nitroso-2-naphthols with α-Functionalized Ketones and Related Compounds: The Unexpected Formation of Decarbonylated 2-Substituted Naphtho[1,2-<i>d</i>][1,3]oxazoles
作者:Nayyef Aljaar、Chandi C. Malakar、Jürgen Conrad、Wolfgang Frey、Uwe Beifuss
DOI:10.1021/jo3022956
日期:2013.1.4
Reactions between 1-nitroso-2-naphthols and α-functionalized ketones such as α-bromo-, α-chloro-, α-mesyloxy-, α-tosyloxy-, and α-hydroxy ketones under basic conditions delivered 2-substituted naphtho[1,2-d][1,3]oxazoles in a single synthetic operation. The product formation was accompanied by the unexpected loss of the C═O group from the α-functionalized ketones. With aryl bromides, allyl bromides
1-亚硝基-2-萘与α-官能化酮如α-溴代,α-氯代,α-甲氧基,α-甲苯磺酰基和α-羟基酮之间的反应在碱性条件下产生了2-取代的萘并[一次合成操作中的1,2- d ] [1,3]恶唑。产物的形成伴随有α-官能化酮中C═O基团的意外损失。以芳基溴化物,烯丙基溴化物,α-溴二酮,α-溴氰化物,α-溴酸酯和α-溴酮酸酯为底物,还观察到了萘并[1,2- d ] [1,3]恶唑的形成。在回流下在1,2-二氯乙烷或乙腈中进行转化,得到相应的萘并恶唑,产率在52%至85%之间。
Facile Protocols towards C2-Arylated Benzoxazoles using Fe(III)-Catalyzed C(sp
2-H) Functionalization and Metal-Free Domino
Approach
Considering their growing attention in the field of medicinal chemistry and drug-discovery research, the facile and convenient approaches towards the preparation of 2-aryl benzoxazole derivatives have been described. The transformation is accomplished by using Fe(III)-catalyzed C–H activation of benzoxazoles with boronic acids to obtain a wide range of C2-arylated benzoxazoles in high yields. The developed
Organocatalytic oxidative synthesis of C2-functionalized benzoxazoles, naphthoxazoles, benzothiazoles and benzimidazoles
作者:Dhananjaya Kaldhi、Nagaraju Vodnala、Raghuram Gujjarappa、Subhashree Nayak、V. Ravichandiran、Sreya Gupta、Chinmoy K. Hazra、Chandi C. Malakar
DOI:10.1016/j.tetlet.2018.12.017
日期:2019.1
give analogous benzoxazoles, naphthoxazoles, benzothiazoles and benzimidazoles. A mechanistic proposal has been drawn based upon the control experiments. It was demonstrated that under the influence of aerobic conditions the catalytic amounts of tBuOOH can be generated by auto-oxidation of tert-butoxide base which plays a decisive role towards successful completion of the developed approach. The described
[EN] DRUG COMBINATIONS FOR THE TREATMENT OF DUCHENNE MUSCULAR DYSTROPHY<br/>[FR] COMBINAISONS DE MÉDICAMENTS POUR LE TRAITEMENT DE LA DYSTROPHIE MUSCULAIRE DE DUCHENNE
申请人:SUMMIT CORP PLC
公开号:WO2009019504A1
公开(公告)日:2009-02-12
Combinations comprising (or consisting essentially of) one or more compounds of formula (1) with one or more ancillary agents, to processes for preparing the combinations, and to various therapeutic uses of the combinations. Also provided are pharmaceutical compositions containing the combinations as well as a method of treatment of Duchenne muscular dystrophy, Becker muscular dystrophy or cachexia using the combinations.