作者:Ni, Shengjun、Zhou, Fengyan、Zhang, Wenzhi、Ma, Jie
DOI:10.1021/acs.joc.4c00561
日期:——
anhydride (Tf2O) catalyzed alkylation of phenols with alcohols is reported. Benefiting from the formation of the triflate in situ, cheap and readily available active alcohols can be used as the alkylating reagents, and the reaction proceeds under mild reaction conditions with a broad substrate scope. This protocol enables the synthesis of ortho-selective phenols and 2,4,6-trisubstitued phenols containing
报道了一种有效的协同三苯甲基阳离子([Ph 3 C][B(C 6 F 5 ) 4 ])/三氟甲磺酸酐(Tf 2 O)催化酚与醇的烷基化反应。受益于原位形成三氟甲磺酸酯,可以使用廉价且易得的活性醇作为烷基化试剂,并且反应在温和的反应条件下进行,底物范围广泛。该方案能够合成邻位选择性苯酚和含有三个不同烷基的 2,4,6-三取代苯酚。合成了三氟甲磺酸叔戊酯,机理研究支持三氟甲磺酸酯介导的烷基化过程。