Bromo-acetic acid (R)-4-{2-[2-(tert-butyl-diphenyl-silanyloxy)-1,1-dimethyl-ethyl]-[1,3]dithian-2-yl}-3-oxo-1-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-ylmethyl)-butyl ester 在
samarium diiodide 作用下,
以
四氢呋喃 为溶剂,
以86%的产率得到(R)-4-{2-[2-(tert-Butyl-diphenyl-silanyloxy)-1,1-dimethyl-ethyl]-[1,3]dithian-2-ylmethyl}-4-hydroxy-6-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-ylmethyl)-tetrahydro-pyran-2-one