Synthesis of 4H-pyrazolo- and 4H-pyrrolophenothiazin-4-one derivatives
✍ Scribed by Seiko Nan'ya; Kaname Katsuraya; Yoshio Ueno; Eturǒ Maekawa
- Book ID
- 112128804
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1988
- Tongue
- English
- Weight
- 198 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0022-152X
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## Abstract For Abstract see ChemInform Abstract in Full Text.
## Abstract A series of new 1__H__‐pyrazolo[3,4‐__d__]pyrimidin‐4(__5H__)‐one Derivatives **5** has been designed and regio‐selectively synthesized __via__ a tandem aza‐Wittig reaction. The structures of all compounds prepared have been confirmed by ^1^H NMR, IR, EI‐MS spectroscopy and elemental an
The first solid-phase synthesis of 1,4-benzothiazin-3(4H)-ones and 1,4-benzoxazin-3(4H)-ones is reported. Alkylation of the immobilized 4-hydroxy-3-nitrobenzamide 2a and 3-nitro-4-sulfanylbenzamide 2b, followed by reduction and cyclization gave 4. Further alkylation and acylation was performed on th
A series of novel 2-ferrocenyl-6-substituted-4H-pyrazolo [5,1-c][1,4]oxazin-4-one derivatives were synthesized by the intra-esterification reaction of ethyl 1-(2-aryl-2-oxoethyl)-3-ferrocenyl-1H-pyrazole-5carboxylate in the presence of magnesium bromide and diisopropylethylamine in one-pot procedure