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2005
Protection
O 0345
21- 067
Odorless Thioacetalization Reagent 2-[1,3]Dithian-2-ylidene-3-oxo-butanamide
and Its Chemoselectivity. — The title dithiane derivative (I) proves to be a promising,
efficient and practical 1,3-propanedithiol equivalent in thioacetalization reactions of a
wide range of carbonyl compounds. Moreover, reagent (I) exhibits high chemoselectivity providing selective protection of aromatic aldehyde or aliphatic ketone in the
presence of an aromatic ketone. The dithiole analogue of (I) appears to be much less
effective as a practical thioacetalization reagent under the conditions studied. —
(LIU, J.; LIU, Q.; YU, H.; OUYANG, Y.; DONG*, D.; Synth. Commun. 34 (2004) 24,
4545-4556; Dep. Chem., Northeast Norm. Univ., Changchun 130024,
Peop. Rep. China; Eng.) — H. Toeppel
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