An Efficient Approach to the [1,2,4]-Triazolo[3,2-d][1,5]Benzoxazepine Skeleton-A Novel Tricyclic Ring System
β Scribed by Liu, Xianjun; Liu, Yi; Wang, Quanrui; Zou, Jianping
- Book ID
- 126673250
- Publisher
- Taylor and Francis Group
- Year
- 2000
- Tongue
- English
- Weight
- 445 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0039-7911
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## Abstract A series of novel tricyclic __O, N__βheterocycles, [1, 2, 4]triazolo[3.2β__d__][1, 5]benzoxazepinβ2βthiones 7 were achieved via acidβinduced ring closure of the geminal arylazo isothiocyanate compounds 5 which were derived from substituted chromanβ4βones. followed by feasible ring expan
## Abstract Derivatives of the new ring system pyrrolo[3,4β__e__][1,2,3] triazolo[1,5β__a__]pyrimidine **6** were prepared in high yields in one step by reaction of 3βazidopyrrole **3** and substituted acetonitriles. Compound **6b** rearranged, upon heating in dimethyl sulfoxide in the presence of