Fluoroalkyl-Substituted Diazomethanes and Their Application in a General Synthesis of Pyrazoles and Pyrazolines
作者:Lucas Mertens、Katharina J. Hock、Rene M. Koenigs
DOI:10.1002/chem.201601707
日期:2016.7.4
A novel continuous‐flow approach for the synthesis of fluoroalkyl‐substituted diazomethanes has been developed. Utilizing a cheap, self‐made microreactor fluoroalkyl‐substituted amines were transformed into the corresponding diazomethanes using tert‐butyl nitrite and acetic acid as catalyst. These diazomethanes were employed in [2+3] cycloaddition reactions with olefins and alkynes, yielding valuable
已经开发出一种新颖的连续流合成氟烷基取代的重氮甲烷的方法。利用廉价的自制微反应器,将氟代烷基取代的胺以亚硝酸叔丁酯和乙酸为催化剂转化为相应的重氮甲烷。这些重氮甲烷被用于与烯烃和炔烃的[2 + 3]环加成反应中,以良好或优异的收率得到有价值的吡唑啉和吡唑。