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Thionation of ω-Acylamino Ketones with Lawesson's Reagent: Convenient Synthesis of 1,3-Thiazoles and 4H-1,3-Thiazines

✍ Scribed by Takehiko Nishio; Mayuko Ori


Publisher
John Wiley and Sons
Year
2001
Tongue
German
Weight
96 KB
Volume
84
Category
Article
ISSN
0018-019X

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## A facile, one-step synthesis of 2-amino-5-oxo-5,6,7,8tetrahydro-4H-benzopyran derivatives 4a-e via cycloaddition reactions of acrylonitrile derivatives la-e with 1,3-cyclohexandione 2 is described. On the other hand, the reactions of 2 with the thioamides If-h afforded 5-0~0-5,6,7,8-tetrahydroq