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2005
Halogenation
O 0235
A Practical Synthetic Method for Vinyl Chlorides and Vinyl Bromides from Kevia the Corresponding Vinyl Phosphate Intermediates. — Vinyl phosphates
18- 045 tones
derived from acyclic or cyclic ketones are conveniently converted to vinyl halides by
reaction with triphenylphosphine dihalide. The method is used advantageously in the
industrial production of the vinyl chloride intermediate (XI) of SUN4057 (XII), a pharmaceutical candidate for the treatment of the acute phase of cerebral infarction. —
(KAMEI*, K.; MAEDA, N.; TATSUOKA, T.; Tetrahedron Lett. 46 (2005) 2,
229-232; Daiichi Suntory Biomed. Res. Co., Ltd., Osaka 618, Japan; Eng.) — Mais
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