- Synthesis of Benzimidazoles Containing a Fused Alicyclic Ring By Rhodium - Catalysed Hydroformylation of N-Alkenyl-1,2-diaminobenzenes
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Rhodium-catalysed reactions of N-alkenyl-1,2-diaminobenzenes (3) with hydrogen and carbon monoxide give benzimidazoles containing a fused alicyclic ring ((8) and (9)) in excellent yields.In some cases intermediate bicyclic compounds can be isolated and the 1H and 13C n.m.r. spectra of one of these, the 3,4,5,6-tetrahydro-4-methyl-3H-1,6-benzodiazocine (6), shows evidence for unusual atropisomerism.
- Anastasiou, Despina,Campi, Eva M.,Chaouk, Hassan,Jackson, W. Roy
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p. 7467 - 7478
(2007/10/02)
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- A metal catalysed route to benzimidazoles containing a fused alicyclic ring
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Rhodium catalysed reactions of N-alkenyl-1,2-diaminobenzenes (1) with hydrogen and carbon monoxide give benzimidazoles containing a fused alicyclic ring (6,7) in excellent yields.
- Anastasiou,Chaouk,Jackson
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p. 2499 - 2500
(2007/10/02)
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- 2H-Benzimidazoles (Isobenzimidazoles). Part 3. Thermal Isomerisation of Substituted 2H-Benzimidazoles to 1H-Benzimidazoles
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2H-Benzimidazole-2-spirocyclohexanes (1) when heated undergo a 1,5-sigmatropic rearrangement to 2,3-disubstituted 1H-benzimidazoles.A decided effect on the direction of this isomerisation was observed with substituents in the homodiene ring.
- Herbert, John A. L.,Iddon, Brian,Robinson, Andrew G.,Suschitzky, Hans
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p. 991 - 998
(2007/10/02)
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