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Dithiane chemistry. III. The addition of Grignard reagents to substituted ketene dithioacetals.

✍ Scribed by Niels H. Andersen; Patrick F. Duffy; Alan D. Denniston; Douglas B. Grotjahn

Publisher: Elsevier Science
Year: 1978
Tongue: French
Weight: 255 KB
Volume: 19
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)95212-8

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✦ Synopsis

The dithianylidene function (I) is well suited as a trap for anionic, cationic, and radical agents due to the ability of sulfur atoms to stabilize all three classes of carbon provalency.

2 The use of this function as an internal quench for carbocationic cyclizations, and studies of cyclizations initiated by the formation of dithienium cations (II)1a'3 illustrate the electrophilic end of this reaction spectrum. Although the anionic side was recognized

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