Toward the Macrocidins: Macrocyclization via Williamson Etherification of a Phenolate
作者:Bertram Barnickel、Rainer Schobert
DOI:10.1021/jo101416x
日期:2010.10.1
The synthesis of macrocyclic 3-acyltetramic acids which are immediate precursors of the fungal herbicide macro-cidin A (1) is reported. The crucial closure of the macrocycle was achieved in excellent yield by an unprecedented Williamson etherification of an omega-bromo phenolate generated in situ by a Pd-mediated O-deallylation.