Acetic acid (1R,2R,3S,4S)-1-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-2,4-dimethyl-5-(toluene-4-sulfonyloxy)-3-triisopropylsilanyloxy-pentyl ester 在
LiCuMe
2(CN) 作用下,
以
乙醚 为溶剂,
反应 1.0h,
以38%的产率得到(2R,3R,4S,5S)-2-[(R)-2-(tert-Butyl-dimethyl-silanyloxy)-1-methyl-ethyl]-3,5-dimethyl-4-triisopropylsilanyloxy-tetrahydro-pyran