Novel regioselective synthesis of 3′H,4H-spiro[chromene-3,2′-[1,3,4]thiadiazol]-4-one containing compounds
✍ Scribed by Mohamed I. Hegab; Adel S. Girgis; I. S. Ahmed-Farag
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2006
- Tongue
- English
- Weight
- 355 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0022-152X
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## Abstract A new and highly versatile method for the synthesis of 1, 3, 4‐thiadiazol‐2 (3 __H__)ones **1** is described. Methoxy‐1,3,4‐thiadiazoles‐ **5**, which are readily available by condensation of __O__‐methyl thiocarbazate (**2**) with acid derivatives **3**, undergo an efficient cleavage t
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
Reaction of 4H-3.1-benzothiazine-4-lhiones 1 with S-methylisothiosemicarbazide hydroiodide yields bamino-1.3.4-thiadiazoles 2 insteud of the espected 1.2,4-triazolo[3,2-c]quinazolines. Structures of compounds 2 have been established by mcans of '>C-N M R analysis and X-ray crystallography. 3-Arnino-