作者:Cyril Henry、David Bolien、Bogdan Ibanescu、Sally Bloodworth、David C. Harrowven、Xunli Zhang、Andy Craven、Helen F. Sneddon、Richard J. Whitby
DOI:10.1002/ejoc.201403603
日期:2015.3
Ketenes were generated by the thermolysis of alkoxyalkynes under flow conditions, and then trapped with amines and alcohols to cleanly give amides and esters. For a 10 min reaction time, temperatures of 180, 160, and 140 degrees C were required for >95 % conversion of EtO, iPrO, and tBuO alkoxyalkynes, respectively. Variation of the temperature and flow rate with inline monitoring of the output by
酮基是通过在流动条件下热解烷氧基炔烃而生成的,然后用胺和醇截留以干净地得到酰胺和酯。在10分钟的反应时间内,分别需要180、160和140摄氏度的温度才能分别使EtO,iPrO和tBuO烷氧基炔烃的转化率> 95%。温度和流速的变化以及通过红外光谱对输出的在线监测使得可以容易地估计用于1-乙氧基-1-辛炔转化的动力学参数(E a = 105.4 kJ / mol)。用醇捕集原位生成的乙烯酮以得到酯,需要添加叔胺催化剂以防止将乙烯酮竞争性地[2 + 2]加成至烷氧基炔烃前体。