Triphosgene and DMAP as Mild Reagents for Chemoselective Dehydration of Tertiary Alcohols
作者:Moshood O. Ganiu、Alexander H. Cleveland、Jarrod L. Paul、Rendy Kartika
DOI:10.1021/acs.orglett.9b01959
日期:2019.7.19
The utility of triphosgene and DMAP as mild reagents for chemoselective dehydration of tertiary alcohols is reported. Performed in dichloromethane at room temperature, this reaction is readily tolerated by a broad scope of substrates, yielding alkenes preferentially with the (E)-geometry. While formation of the Hofmann products is generally favored, a dramatic change in alkene selectivity toward the
据报道,三光气和DMAP作为温和试剂用于叔醇的化学选择性脱水。该反应在室温下在二氯甲烷中进行,很容易被宽范围的底物所耐受,优先以(E)-几何结构产生烯烃。尽管通常优选霍夫曼产物的形成,但是当反应在二氯乙烷中在回流下进行时,观察到烯烃对Zaitzev产物的选择性的急剧变化。