
A synthon approach to spiro compounds
Keywords: Photochromism; Synthon; Spiro compounds; BINAP; 2,2â²-bis(diphenylphospospiro)-1,1â²-binaphthalene; Boc; t-butoxycarbonyl; CTAB; cetyltrimethylammonium bromide; DEAD; diethylazodicarboxylate; 4-DMAP; 4-(dimethylamino)pyridine; Fmoc; 9-fluorenylmethoxyca