原位生成的Ph_3C^+均相有机催化剂催化4,4'-芳亚甲基-二(3-甲基-1-苯基-1H-吡唑-5-醇)高效合成（英文）  

In situ generation of trityl carbocation(Ph_3C^+) as a homogeneous organocatalyst for the efficient synthesis of 4,4'‐(arylmethylene)‐bis(3‐methyl‐1‐phenyl‐1H‐pyrazol‐5‐ol)s

作　　者：Abdolkarim Zare Maria Merajoddin Ahmad Reza Moosavi‐Zare Mahmoud Zarei 

机构地区：[1]Department of Chemistry, Payame Noor University [2]Department of Chemistry, University of Sayyed Jamaleddin Asadabadi [3]Faculty of Chemistry, Bu‐Ali Sina University

出　　处：《催化学报》2014年第1期85-89,共5页

摘　　要：Trityl chloride(Ph3CCl) efficiently catalyzes the condensation of 3‐methyl‐1‐phenyl‐1H‐pyrazol‐ 5(4H)‐one and aromatic aldehydes under mild and solvent‐free conditions, affording 4,4'‐(arylmethylene)‐ bis(3‐methyl‐1‐phenyl‐1H‐ pyrazol‐5‐ol)s in high to excellent yields and in short reaction time. The presence of the requisite organocatalytic trityl carbocation(Ph3C+) species was confirmed by analysis of infrared, 1H NMR, and ultra violet spectral data. A plausible mechanism was proposed for the reaction based on the observations and literature precedent.Trityl chloride （Ph3CC1） efficiently catalyzes the condensation of 3-methyl-1-phenyl-lH-pyrazol- 5（4H）-one and aromatic aldehydes under mild and solvent-free conditions, affording 4,4＇-（aryl- methylene）-bis（3-methyl-1-phenyl-1H- pyrazol-5-ol）s in high to excellent yields and in short reaction time. The presence of the requisite organocatalytic trityl carbocation （Ph3C＋） species was confirmed by analysis of infrared, 1H NMR, and ultra violet spectral data. A plausible mechanism was proposed for the reaction based on the observations and literature precedent.

关 键 词：有机催化剂 三苯甲基 碳正离子 亚甲基 有效合成 原位生成 苯基 芳基 

分 类 号：O643.36[理学—物理化学]