Jeffrey M. Robertson used model reactions to investigate intermediates in liquid-crystal polymer synthesis. Trapping experiments with secondary amines supported formation of a quinoid ketene through E1cb elimination, connecting a proposed intermediate with an observable product.[ref]
Model experiments implicate a benzoquinoneketene intermediate in LCP synthesis by Jeffrey M. Robertson and colleagues. 2011, hydroxybenzoyl ester models, E1cB fragmentation and secondary-amine trapping
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