重氮甲烷 、 (Ξ)-2-[(3a
R)-5
c-((
R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2-phenyl-(3a
r,6a
c)-3a,5,6,6a-tetrahydro-furo[3,2-
d]oxazol-6
c-yloxy]-propionic acid 生成
(Ξ)-2-[(3aR)-5c-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2-phenyl-(3ar,6ac)-3a,5,6,6a-tetrahydro-furo[3,2-d]oxazol-6c-yloxy]-propionic acid methyl ester