Free-radical chain generation of ketene during the synthesis of liquid crystalline aromatic polyesters
作者:Mihaiela C. Stuparu、Juhua Xu、H.K. Hall
DOI:10.1016/j.tetlet.2009.08.099
日期:2009.12
for the preparation of liquid crystalline aromatic polyesters (LCPs), ketene cleavage occurred from acetoxyarenes. Ketene is known to oligomerize to colored oligomers which may be responsible for an undesirable yellow color in LCPs. Thermolysis of the modelcompound p-acetoxybenzoate gave ketene oligomers and methyl p-hydroxybenzoate, which oligomerized. A free-radical chain reaction mechanism for ketene