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2005
Thiopyran derivatives
R 0370
A New Method for the Preparation of Polyfluoroalkanedithiocarboxylates. —
easy procedure, reaction of dichloropolyfluoroalkylsulfenylchlorides (II) with
34- 189 The
mercaptans (III) in the presence of zinc chloride, enables the synthesis of alkyl and aryl
polyfluoroalkyl dithiocarboxylates like (IV) using one precursor. Sulfenylchlorides (II)
are easily obtained by chlorination of benzyl sulfides, cf. (Ia), (Ib), or benzyl dithioacetals, cf. (Ic), (Id). The dienophilic character of dithioesters (IV) is demonstrated by
cycloaddition of (IV) with dimethyl butadiene (V) affording thiopyran derivatives (VI).
— (TIMOSHENKO, V. M.; TKACHENKO, A. V.; SHERMOLOVICH*, Y. G.; J.
Fluorine Chem. 126 (2005) 3, 361-364; Inst. Org. Chem., Natl. Acad. Sci. Ukr.,
Kiev 02094, Ukraine; Eng.) — H. Hoennerscheid
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