在
(Ra)-4-hydroxy-2,6-bis(2,4,6-triisopropylphenyl)-5,5’,6,6’,7,7’,8,8’-octahydrodinaphtho[1,3,2]dioxaphosphepine 4-oxide 、
diallyl 2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate 作用下,
以
甲苯 为溶剂,
以98%的产率得到(R)-4-(4-tert-butylphenyl)-2-phenyl-4H-chromene