[EN] 7- (1, 3-THIAZOL-2-YL)THIO!-COUMARIN DERIVATIVES AND THEIR USE AS LEUKOTRIENE BIOSYNTHESIS INHIBITORS [FR] DERIVES DE 7- (1,3-THIAZOL-2-YL)THIO !COUMARINE ET UTILISATION DE CEUX-CI EN TANT QU'INHIBITEURS DE LA BIOSYNTHESE DES LEUCOTRIENES
Niobium Pentachloride Promoted Conversion of Carboxylic Acids to Carboxamides: Synthesis of the 4-Aryl-1,2,3,4-tetrahydroisoquinoline Alkaloid Structures
作者:Claudio C. Lopes、Rosangela S. Lopes、Marcelo S. Nery、Renata P. Ribeiro
DOI:10.1055/s-2003-36823
日期:——
A practical method for the conversion of carboxylic acids to the corresponding carboxamides mediated by niobium pentachloride under mild conditions is described. The synthesis of the 4-aryl-1,2,3,4-tetrahydroisoquinoline alkaloid structures was accomplished via benzylic lithiation of N-methyl-3,4-dimethoxy-2-(4'-methoxybenzyl)benzamide.
New 4-arylpiperidine derivatives for the treatment of pruritus
申请人:——
公开号:US20030004340A1
公开(公告)日:2003-01-02
There is provided a compound of formula I,
1
wherein Het
1
, R
1
, R
2
, R
3
, X and n have meanings given in the description, which are useful in the prophylaxis and in the treatment of diseases mediated by opiate receptors, such as pruritus.
Bromination of Enamines from Tertiary Amides Using the Petasis Reagent: A Convenient One-Pot Regioselective Route to Bromomethyl Ketones
作者:Marwan Kobeissi、Khalil Cherry、Wissam Jomaa
DOI:10.1080/00397911.2013.765484
日期:2013.11.2
bromomethyl ketones is achived using the Petasis reagent (dimethyltitanocene) as a key for enamine generation. Several amides were used to test the limits of the procedure by changing either the alkyl chain R or the amino portion of the starting materials. The enamines generated in situ were allowed to react with bromine at low temperature followed by hydrolysis to yield bromomethyl ketones in excellent
摘要 使用 Petasis 试剂(二甲基二茂钛)作为烯胺生成的关键,实现了溴甲基酮的原始一锅法合成。通过改变烷基链 R 或起始材料的氨基部分,使用几种酰胺来测试该程序的限制。使原位生成的烯胺在低温下与溴反应,然后水解,以极好的收率(85% 至 95%)得到溴甲基酮。简要讨论了反应的机理细节和最佳条件。本方法提供了几个优点,例如烯胺形成的区域选择性、良好的产率、温和的反应条件和易于实验。[本文提供补充材料。去出版商'
QUINOLINE DERIVATIVES
申请人:Jung Frederic Henri
公开号:US20090076075A1
公开(公告)日:2009-03-19
The invention concerns quinoline derivatives of Formula I
or a pharmaceutically-acceptable salt thereof, wherein each of X
1
, p, R
1
, q, R
2
, R
3
, R
4
, R
5
Ring A, r and R
6
has any of the meanings defined hereinbefore in the description; processes for their preparation, pharmaceutical compositions containing them and their use in the manufacture of a medicament for use in the treatment of cell proliferative disorders.
Über eine neue Methode zur positionsselektiven Einführung von Trifluormethyl-Gruppen in Heteroaromaten, Teil 2.<sup>1</sup>Nucleophile Substitution an 5-fluor-4-trifluormethyl-substituierten 1,3-Azolen
作者:Klaus Burger、Dieter Hübl、Klaus Geith
DOI:10.1055/s-1988-27510
日期:——
A New Method for Regioselective Introduction of Trifluoromethyl Groups into Heteroarenes; Part2. Nucleophilic Substitution of 5-Fluoro-4- trifluoromethyl-1,3-azoles 5-Fluoro-4-trifluoromethyl-1,3-azoles are readily susceptible to nucleophilic displacement reactions at C-5. With binucleophiles, the reactioncan be used for linking trifluoromethyl-substituted 1,3-azoles to aromatic, heteroaromatic, and heterocyclic systems, linearly or angularly,directly or across various bridging groups respectively.