An efficient procedure for preparation of 2-monoalkyl or 2-monoaryl-3-ethoxycyclobutanones
作者:Jun-ichi Matsuo、Ryosuke Okuno、Kosuke Takeuchi、Mizuki Kawano、Hiroyuki Ishibashi
DOI:10.1016/j.tetlet.2010.05.031
日期:2010.7
Optimized reaction conditions for the preparation of various 2-monosubstituted 3-ethoxycyclobutanones are described. 2-Monoalkyl 3-ethoxycyclobutanones were efficiently prepared by the reaction of the corresponding carboxylic acid chlorides and an excess amount of ethyl vinyl ether in the presence of diisopropylethylamine at 90 degrees C in a sealed tube. 2-Monoaryl 3-ethoxycyclobutanones were prepared by using 2,6-lutidine as a base in the above-mentioned procedure. (C) 2010 Elsevier Ltd. All rights reserved.