(1'R,2S,4'R)-1',7',7'-trimethylspiro[1,3-oxathiolane-2,2'-bicyclo[2.2.1]heptane]-5-one 、 (E)-1-Iodo-pentadec-2-ene 在
lithium diisopropyl amide 作用下,
生成 (1R,2S,4'R)-2-(1,7,7-trimethylbicyclo[2.2.1]heptane)-spiro-2'-[4'-(2-pentadecenyl)-1',3'-oxathiolan-5'-one] 、
(1R,2S,4'S)-2-(1,7,7-trimethylbicyclo[2.2.1]heptane)-spiro-2'-[4'-(2-pentadecenyl)-1',3'-oxathiolan-5'-one]