froide, il se forine un pr6cipiti: qui est entiitreinelit soluble dam 1'Bther. En faisant cristalliser ce pritcipitit dans l'alcool, nous avons obtenu de petits prismes incolores, fusibles A 78--80°. Ce point de fusion est celui de l'hexacittate d'isosaccharosane (voir l'article prkckdent). Le mklan
Synthèse photochimique de biaryles et hétérobiaryles à partir d'aryl-et hétéroarylamines, d'un nitrite d'alkyle et d'un substrat aromatique ou hétéroaromatique
✍ Scribed by Michel Julliard; Chhan Siv; Gaston Vernin; Jacques Metzger
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- German
- Weight
- 424 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Photochemical synthesis of biaryls and heterobiaryls from aryl and heteroarylamines, alkylnitrite and aromatic or heteromatic substrates
The photochemical reaction of aromatic and heteroaromatic amines with excess t‐butyl nitrite in aromatic solvents (benzene, p‐xylene, mesitylene) and in hetero‐aromatic solvents (furan, thiophene) leads to biaryls or heterobiaryls. t‐Butyl nitrite is more convenient than isopentyl nitrite which gives by‐products. This new method has been used to synthesize 28 compounds in 17 to 60% yield.
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**Synthesis of Sugar Derivatives Bearing a Spiro Heterocycle __via__ Nucleophilic Cyclization** Treated with the 1,4‐binucleophiles 1,2‐diaminoethane, 2‐aminoethanol, 2‐aminoethanethiol, L‐cysteine, __o__‐phenylenediamine, __o__‐aminophenol or __o__‐aminothiophenol the ketosugar derivative **1** ga