7-chloromethyl-2,2,5,8-tetramethylchroman-6-ol 在
碳酸氢钠 作用下,
生成
2,2,2',2',5,5',8,8'-octamethyl-7,7'-methylenebischroman-6-ol 、 3',4,4',7,8,9,10',11',12',15'-decahydro-2',2',5,5',7,7,7a',9',10,12',12',14'-dodecamethylbenzo<1,2-b:4,5-b'>dipyran-2(3H)-spiro-7'(2'H)-xantheno<6,7-b:9a,1-b'>dipyran-6'-one