22157-28-4
3-methoxy-2(E)-butenoic acid ethyl ester
+
107-19-7
2-丙炔-1-醇
→
~81%
122552-44-7
ethyl 2-bromo-3-methoxy-3-prop-2-ynoxybutanoate
6148-33-0
ethyl 2,4-dimethylfuran-3-carboxylate