(3aS)-7t-benzoyloxy-6c-benzoyloxymethyl-4t-((5R)-8t-benzyloxy-6c-methyl-2-oxo-(5rO)-1,3,7-trioxa-spiro[4.4]non-9c-yloxy)-3-methyl-(3ar,7at)-tetrahydro-pyrano[3,4-d]oxazol-2-one 在
钯 氢气 作用下,
以
1,4-二氧六环 为溶剂,
生成 (
R)-((3a
S)-7
t-benzoyloxy-6
c-benzoyloxymethyl-3-methyl-2-oxo-(3a
r,7a
t)-hexahydro-pyrano[3,4-
d]oxazol-4
t-yloxy)-[(
R)-4-((
S)-1-hydroxy-ethyl)-2-oxo-[1,3]dioxolan-4-yl]-acetaldehyde