(3'R)-1,3'-dimethyl-6',7'-dihydro-3'H-spiro[indoline-3,2'-oxepin]-2-one 在
三氟化硼乙醚 作用下,
以
乙腈 为溶剂,
生成
(2'R,3'R)-1,3'-dimethyl-6',7'-dihydro-3'H-spiro[indoline-3,2'-oxepin]-2-one 、
(2'S,3'R)-1,3'-dimethyl-6',7'-dihydro-3'H-spiro[indoline-3,2'-oxepin]-2-one