Diastereoselective Radical Bromination of 5,6-Dihydro-4H-1,2-oxazines and Subsequent Substitution Reactions with Nitrogen Nucleophiles
✍ Scribed by Paulini, Klaus ;Reißig, Hans-Ulrich
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1994
- Tongue
- English
- Weight
- 487 KB
- Volume
- 127
- Category
- Article
- ISSN
- 0009-2940
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
application may be in medicine where it might be possible to form three dimensional images of biological structures assuming that the problems associated with the transmission of sound in tissue can be solved. The fact that systems for use in acoustical holography are rapidly becoming all-electroni
## Abstract A variety of 5,6‐dihydro‐4__H__‐1,2‐oxazines 3 and 4 is prepared in good yields from silyl enol ethers 1 and nitroso alkenes 2a or 2b, respectively. A systematic variation of substituents reveals preparative scope and limitations of this hetero Diels‐Alder reaction with inverse electron
## Abstract magnified image Reaction of 2‐(5‐substituted‐2‐hydroxybenzylamino)phenols (**2**) with formalin in ethanol under reflux has chemoselectively led to 2‐(6‐substituted‐2__H__—benzo[__e__][1,3]oxazin‐3(4__H__)‐yl)phenols (**3**) in good yield involving the ring closure of the hydroxyl grou