Flash vacuum pyrolysis (FVP) of o-allyloxycinnamate esters gives benzofurans in high yield, via cyclisation of a phenoxyl radical and subsequent cleavage of the carboxylic ester function; coumarins are obtained by FVP of the corresponding phenols.
                                    邻烯丙基
肉桂酸酯的闪速真空热解(FVP)可通过苯氧自由基的环化和随后的羧基酯功能裂解,得到高产率的
苯并呋喃;相应
苯酚的 FVP 可得到
香豆素。