在无溶剂条件下,以四丁基溴化铵为表面催化剂,将2-(α-氯烷基)苯并咪唑1与芳基亚磺酸钠2反应,通过使用研钵和研棒进行简单的物理研磨,得到1 H -2-(α-芳基磺酰基烷基)苯并咪唑3。后者在无溶剂条件下用烷基化剂处理会产生1-烷基/芳烷基-2-(α-芳基磺酰基烷基)苯并咪唑4。可替代地,4也可以直接从1-烷基/芳烷基-2-(α-氯烷基)苯并咪唑制得5通过与反应2,这反过来又可以通过反应来制备1在无溶剂的条件下使用烷基化剂,所有这些反应都不含有机溶剂,包括实验步骤。J.杂环化学。(2010)。
Fluorinated enones were reacted with thiazoles, imidazoles, benzimidazoles and benzthiazoles bearing methylene groups activated by electron-withdrawing substituents. The reactions start with a nucleophilic attack of the methylene carbon on the β-position of the enones. If the starting methylene compound contains a thi-azole ring, pyrones or pyridones were formed due to participation of the ester or
Heating 3-formylchromone with a variety of benzimidazoles and imidazoles in N,N-dimethylformamide in the presence of chlorotrimethylsilane as a promoter and water-scavenger gave functionalized pyrido[1,2-a]benzimidazoles and imidazo[1,2-a]pyridines.
Zinc-Mediated Tandem-One-Pot Facile Synthesis of 1-(Arylsulfonyl) Aryl/Heteryl Methanes: A Case of C‒S Bond Formation
作者:K. Srinivas、P. K. Dubey
DOI:10.1080/00397911.2010.488310
日期:2011.5.3
Abstract Reaction of arylmethyl/heteryl methyl zinc chloride (generated in situ fromaryl methyl and heteryl methyl chloride and zinc metal) with aryl sulfonyl chlorides in tetrahydrofuran (THF) under mild conditions (i.e., at room temperature) furnishes the corresponding 1-(aryl sulfonyl)aryl/heteryl methanes in good yields.