## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 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
Synthesis of new chromeno[4,3,2-de]quinazolin-2-ones, -quinazolines and -pyrrolo[2,1-b]quinazolines
✍ Scribed by Carlos M. Martínez-Viturro; Domingo Domínguez
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2007
- Tongue
- English
- Weight
- 549 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0022-152X
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✦ Synopsis
Abstract
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The total synthesis of chromeno[4,3,2‐de]quinazolin‐2‐ones, ‐quinazolines and ‐pyrrolo[2,1‐b]quinazolines from easily prepared 4‐methoxy‐1‐nitro‐9__H__‐xanthen‐9‐one is reported. These compounds, in which a 1,3‐diazine ring is fused to the xanthene scaffold, were obtained with good overall yields in very few steps.
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## 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
## Abstract The reaction of 3‐__N__‐(2‐mercapto‐4‐oxo‐4__H__‐quinazolin‐3‐yl)acetamide (**1**) with hydrazine hydrate yielded 3‐amino‐2‐methyl‐3__H__‐[1,2,4]triazolo[5,1‐__b__]quinazolin‐9‐one (**2**). The reaction of **2** with __o__‐chlorobenzaldehyde and 2‐hydroxy‐naphthaldehyde gave the corresp