Azoles. Part II. Synthesis of imidazole-2(and -5)-carbaldehydes and derivatives of imidazo[1,2-b]isoquinoline; transmetallation of imidazol-5-yllithium compounds
作者:Brian Iddon、Anders K. Petersen、Jan Becher、Nils J. Christensen
DOI:10.1039/p19950001475
日期:——
The transmetallations of 1-protected 4-bromoimidazol-5-yllithium derivatives have been studied using DMF as the quenching reagent. 4-Bromoimidazole-2-carbaldehydes are usually the major products and not the -5-carbaldehydes as reported previously. Various attempts to prevent or inhibit these transmetallations are described. Cyclisation of 4-bromo(and 4,5-dibromo)-1-(3,4-dimethoxybenzyl)imidazole-2-carbaldehyde and 1-(3,4-dimethoxybenzyl)benzimidazole-2-carbaldehyde in TFA gave the corresponding imidazo- or benzimidazo-[1,2-b]isoquinoline.
Iddon, Brian; Khan, Nazir, Journal of the Chemical Society. Perkin transactions I, 1987, p. 1445 - 1452
作者:Iddon, Brian、Khan, Nazir
DOI:——
日期:——
Iddon Brian, Petersen Anders K., Becher Jan, Christensen Nils J., J. Chem. Soc. Perkin Trans. 1, (1995) N 12, S 1475-1481
作者:Iddon Brian, Petersen Anders K., Becher Jan, Christensen Nils J.
DOI:——
日期:——
IDDON, B.;KHAN, N.;LIM, BEE, LAM, J. CHEM. SOC. CHEM. COMMUN., 1985, N 20, 1428-1429
作者:IDDON, B.、KHAN, N.、LIM, BEE, LAM
DOI:——
日期:——
IDDON, BRIAN;KHAN, NAZIR, J. CHEM. SOC. PERKIN TRANS.,(1987) N 7, 1445-1451