(1S,2R,4S,4'R)-4'-(2-oxobut-3-enyl)-4',5'-dihydro-2'H-spiro-[bicyclo[2.2.2]oct[5]ene-2,3'-furan]-2'one 在
RuCl2(1,3-dimesityl-imidazolidin-2-yl)(PCy3)(=CHPh) 、
乙烯 作用下,
以
甲苯 为溶剂,
以82%的产率得到(1S,4S,4'R,5R)-4'-(2-oxobutyl)spiro[bicyclo[2.2.2]oct-2-ene-5,3'-oxolane]-2'-one