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Synthese von Thieno-[2′,3′∶4,5]pyrimido[1,2—b][1,2]benzisothiazolderivaten

✍ Scribed by F. Sauter; W. Deinhammer

Book ID
105000933
Publisher
Springer Vienna
Year
1974
Tongue
English
Weight
143 KB
Volume
105
Category
Article
ISSN
0026-9247

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**Syntheses of New Salts of Thieno[2′,3′;4,5]imidazo[1,2‐a]pyridines** Mesomeric 1‐[2‐amino‐1‐cyano‐2‐thio‐]ethene‐pyridinium ylides **1** are cyclizized to imidazo[1,2‐a]pyridinium ylides **2** in the presence of HgO. S‐alkylation of **2** leads to derivatives of 1‐R^1^‐2‐thio‐3‐cyano‐imidazo[1,2‐