Photocycloaddition reactions of 1,4-benzoxazin-2-ones and electron-poor olefins
β Scribed by Nishio, Takehiko; Omote, Yoshimori
- Book ID
- 126816396
- Publisher
- American Chemical Society
- Year
- 1985
- Tongue
- English
- Weight
- 541 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0022-3263
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## Abstract The present review covers the synthesis and reactions of 2βheteroβ4__H__β3,1βbenzoxazinβ4βones which include oxygen, sulfur and nitrogen substituents. Literature coverage includes publications primarily from the mid 1960's to December 1999.
## Abstract Substituted 2β(benzylamino)β2__H__β1,4βbenzoxazinβ3(4__H__)βones are unstable under alkaline and acidic conditions, undergoing opening of the benzoxazinone ring. 2βBromoβ2__H__β1,4βbenzoxazinβ3(4__H__)βones show similar degradation under alkaline conditions, while replacement of Br at C
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O-Acetates of 4-hydroxy and 4-hydroxy-7-methoxy-2H-1,4-benzoxazln-3-ones reacted with nucleophlles such as phenols, lndoles and ethanethlol The maJor reaction center IS the positively-charged nitrogen atom