、
trans-1,2-bis(tert-butyldimethylsilyloxy)-1,2-benzocyclobutene 以
氘代苯 为溶剂,
生成 (1'R,2R,3'S,4'R/1'S,2S,3'R,4'S)-4-bromo-1',4'-bis(tert-butyldimethylsilyloxy)-3-methyl-5-oxo-3',4'-dihydro-1'H,5H-spiro[furan-2,2'-naphthalene]-3'-carbaldehyde 、 (1'S,2R,3'S,4'S/1'R,2S,3'R,4'R)-4-bromo-1',4'-bis(tert-butyldimethylsilyloxy)-3-methyl-5-oxo-3',4'-dihydro-1'H,5H-spiro[furan-2,2'-naphthalene]-3'-carbaldehyde