In addition to the parent compounds, nine methyl-substituted l,Mibydro-4H-3,l-benzoxazines with and without N-methyl substitution were prepared. The chain tautomer could only be detected in the case of 1,2-dihydro-2+ nitrophenyl)-4H-3,1-benzoxazine in solution. The configurational and conformational
1H and 13C NMR spectral studies of some Mannich bases. Revised structures for the mono-substituted products from 3-hydroxy-2-pyridone
✍ Scribed by Alan G. Osborne; Lee Jackson; Paul D. Taylor
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 388 KB
- Volume
- 49
- Category
- Article
- ISSN
- 1386-1425
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The syntheses, ^1^H, ^13^C and ^31^P NMR chemical shifts and ^13^C‐^31^P coupling constants of 2‐aryloxy/cyclicamino‐2,3‐dihydro ‐3‐ (4‐methylphenyl) ‐1__H__ ‐ naphth [1,2__‐e__] [1,3,2]oxazaphosphorine 2‐oxides/sulphides and the ^13^C NMR data for 4‐substituted ‐ dinaphtho [2,1 ‐__d__:
## Abstract Seventeen __N__‐substituted 3,4‐dihydro‐2__H__‐1,3‐benzoxazines [__N__‐substituent = Et, Pr^__i__^, Bu^__t__^, CH~2~C~6~H~5~ or CH(CH~3~)C~6~H~5~] were prepared and their structures studied in the light of ^13^C chemical shifts. The γ effects caused by C(α)‐methyl or C(α)‐phenyl substit