K. Chmurski et J. Defaye, Regioselective halogenation of primary alcohol groups of cyclodextrins with halomethylenemorpholinium halides Vilsmeier-Haack reagents, POL J CHEM, 73(6), 1999, pp. 967-971
Per(6-bromo-6-deoxy)cyclomalto-hexaose, -heptaose, and -octaose and the cor
responding per(6-chloro-6-deoxy) derivatives were prepared in high yield by
reaction of bromomethylenemorpholinium bromide or chloromethylenemorpholin
ium chloride, respectively, with cyclomaltohexaose, cyclomaltoheptaose and
cyclomaltooctaose in dimethylformamide.