Rearrangements of 4-alkynyl-, 4-alkenyl-, and 4-alkyl-4-hydroxy-3-methylenecyclobutenes
✍ Scribed by Ezcurra, John E.; Pham, Christine; Moore, Harold W.
- Book ID
- 126171530
- Publisher
- American Chemical Society
- Year
- 1992
- Tongue
- English
- Weight
- 362 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0022-3263
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## Abstract Decarboxylation of allylic esters of 4‐carboxypyrimidines in toluene at 111 °C in the presence of a Pd(0) catalyst, gives a mixture of a 4‐alkenylpyrimidine and a pyrimidine unsubstituted in the 4‐position. If the decarboxylation is carried out in the presence of benzaldehyde, then benz
In the molecule of the title compound, C 13 H 11 NO 6 S, an intramolecular O-HÁ Á ÁO hydrogen bond is formed between the hydroxy group and the nitro O atom. The two aromatic rings form a dihedral angle of 48.8 (2) .
The title compound, C 14 H 11 ClO 2 , possesses normal geometrical parameters. The two benzene rings are twisted by 54.70 (4) , perhaps as a result of steric repulsion between H atoms. The crystal packing is consolidated by an O-HÁ Á ÁO hydrogen bond,stacking and C-HÁ Á ÁO and C-HÁ Á Á interactions,