2-苯基-4H-1,3-噻唑-5-酮 、 (4R,4aR,10bS)-7-Hydroxy-2,2,10b-trimethyl-6-oxo-4a,5,6,10b-tetrahydro-4H-naphtho[1,2-d][1,3]dioxine-4-carbaldehyde 在
magnesium sulfate 、
三乙胺 作用下,
以
乙醚 为溶剂,
生成
4-(7-hydroxy-2,2,10b-trimethyl-6-oxo-(4ar,10bc)-4a,5,6,10b-tetrahydro-4H-naphtho[1,2-d][1,3]dioxin-4c-ylmethylene)-2-phenyl-4H-thiazol-5-one