(1R,3R,6R,9R)-4-Hydroxymethyl-3,6-dimethyl-10,12-dioxa-tricyclo[7.2.1.01,6]dodec-4-en-11-one 在
咪唑 、
三氟化硼乙醚 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (1R,2R,5R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-2-(2-[1,3]dithiolan-2-yl-ethyl)-1-hydroxy-2,5-dimethyl-cyclohex-3-enecarboxylic acid