摘要 我们报告了一种新型的合成咪唑并[1,5 - a ]吡啶-1-羧酸的有效方法。通过使2-(氨基甲基)吡啶与酰氯反应,然后用三氟乙酸酐一锅处理,得到2,2,2-三氟-1-咪唑并[1,5 - a ]吡啶-1-丙酮酮,然后通过卤代形式裂解以高制备产率将其转化为咪唑并[1,5 - a ]吡啶-1-羧酸。 我们报告了一种新型的合成咪唑并[1,5 - a ]吡啶-1-羧酸的有效方法。通过使2-(氨基甲基)吡啶与酰氯反应,然后用三氟乙酸酐一锅处理,得到2,2,2-三氟-1-咪唑并[1,5 - a ]吡啶-1-丙酮酮,然后通过卤代形式裂解以高制备产率将其转化为咪唑并[1,5 - a ]吡啶-1-羧酸。
C–H Functionalization of Cyclopropanes: A Practical Approach Employing a Picolinamide Auxiliary
摘要:
A Pd-catalyzed, picolinamide-enabled, and efficient C-H arylation of cyclopropanes is described. The reaction can be promoted by either a silver additive or catalytic pivalic acid in the presence of a carbonate base. Various aryl iodides can be employed as coupling partners, providing exclusively cis-substituted cyclopropylpicolinamides.
An efficient method for N-acylation of amides is described using a pyridine ring as the internal nucleophilic catalyst to give imides in moderate to excellent yields. The methodology provides a facile, air insensitive, and environmentally friendly route to form diversified imide scaffolds, which exist widely in natural products and biologically active materials.
Triflic Anhydride Mediated Synthesis of Imidazo[1,5-<i>a</i>]azines
作者:Guillaume Pelletier、André B. Charette
DOI:10.1021/ol400870b
日期:2013.5.3
Imidazo[1,5-a]azines are synthesized in moderate to excellent yields using a mild cyclodehydration/aromatization reaction triggered by the use of triflic anhydride (Tf2O) and 2-methoxypyridine (2-MeOPyr). Various substitution patterns and functional groups were found to be compatible under the optimized conditions. In addition, a 5-bromo-3-aryl derivative was also shown to be active in a Sonogashira
使用温和的环脱水/芳香化反应,通过使用三氟甲磺酸酐(Tf 2 O)和2-甲氧基吡啶(2-MeOPyr)引发,可以中等至极好的收率合成咪唑并[1,5- a ]嗪。发现各种取代模式和官能团在优化条件下是相容的。此外,还显示了5-溴-3-芳基衍生物在Sonogashira交叉偶联和直接芳基化反应中具有活性。叔酰胺与底物相容,可合成三氟甲磺酸咪唑并[1,5- a ]吡啶鎓。
SUBSTITUTED ARYLPYRAZOLES FOR USE AGAINST PARASITITES
申请人:Pfizer Limited
公开号:EP1893581A1
公开(公告)日:2008-03-05
[EN] SUBSTITUTED ARYLPYRAZOLES FOR USE AGAINST PARASITITES<br/>[FR] ARYLPYRAZOLES SUBSTITUES POUR UNE UTILISATION CONTRE LES PARASITES
申请人:PFIZER LTD
公开号:WO2006134468A1
公开(公告)日:2006-12-21
[EN] This invention relates to a range of 1-aryl-4-cyclopropylpyrazoles wherein all substituents are as defined in the application in which the cyclopropyl ring is substituted at the angular position, and pharmaceutically acceptable salts and solvates thereof, to compositions comprising such compounds, processes to their synthesis and their use as parasiticides. [FR] Cette invention concerne une gamme de 1-aryl-4-cyclopropylpyrazoles dans lesquels tous les substituants sont tels que définis dans la description, le cycle cyclopropyle étant substitué en position angulaire, ainsi que les sels et les solvates pharmaceutiquement acceptables de ces composés. L'invention concerne également des compositions contenant de tels composés, leurs procédés de synthèse, et leur utilisation en tant que parasiticides.