## Abstract Substituted 2‐(benzylamino)‐2__H__‐1,4‐benzoxazin‐3(4__H__)‐ones are unstable under alkaline and acidic conditions, undergoing opening of the benzoxazinone ring. 2‐Bromo‐2__H__‐1,4‐benzoxazin‐3(4__H__)‐ones show similar degradation under alkaline conditions, while replacement of Br at C
4-Amino-3-pyridiniochinolin-2(1H)-on-chloride und 3,4-Diaminochinolin-2(1H)-one
✍ Scribed by Gewald, Karl ;Sch äfer, Harry ;Bellmann, Peter ;Müller, Heike
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1991
- Tongue
- English
- Weight
- 529 KB
- Volume
- 124
- Category
- Article
- ISSN
- 0009-2940
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Ring Enlargement of 1,2-Thiazol-3(2H)-one-l,l-dioxides and 3-Amino-2H-azirines to 4H-1,2,S-Thiadiazocin-6-one-l, 1-dioxides Reaction of 3-amino-2H-azirines 2 with the 1,l-dioxides 4 and 7 of 1,2-thiazol-3(2H)-ones and 1,2-thiazolidin-3-ones, respectively, in i-PrOH at room temperature leads to 4H-1
## Abstract Acylation of 5‐amino‐3__H__‐1,3,4‐thiadiazolin‐2‐one (2) was undertaken selectively at either the 3‐NH position or at 5‐amino group depending on reaction conditions. The 3‐NH is highly acidic and acylation takes place with acid anhydrides at this position in high yields in the presence