Herein, we report a mild and efficient hydroxymethylation of quinolines via an iron promoted cross-dehydrogenativecouplingreaction under external acid free conditions. Various hydroxyalkyl substituted quinolines were achieved in excellent yields with well tolerated functional groups. Importantly, a few of the hydroxylmethylated quinolines were further transformed into respective aldehydes, and were
Rhodium(I) complexes of 8-methyl-, 8-ethyl-, and 8-isopropyl-quinolines and related 2-substituted derivatives
作者:Antony J. Deeming、Ian P. Rothwell
DOI:10.1039/dt9800001259
日期:——
The complexes [Rh(CO)(PPh3)2L][ClO4] have been prepared from [Rh(CO)(PPh3)2(CH3COCH3)][ClO4] on adding unidentate L (8-methyl-, -ethyl-, or -isopropyl-quinoline) or bidentate L (1,10-phenanthroline or quinoline-2-carboxaldehyde-N-methylimine). 8-Alkyl-substitution of the latter ligand gives the complexes [Rh(CO)-(PPh3)2L][ClO4] as isomers with uni- and bi-dentate L respectively with relative stabilities
Palladation behaviour of 8-methyl-, 8-ethyl-, and 8-isopropyl-quinolines and some of their 2-substituted derivatives
作者:Antony J. Deeming、Ian P. Rothwell
DOI:10.1016/s0022-328x(00)82943-5
日期:1981.1
CH2OH or CO2H. The products are characterised spectroscopically and there is a discussion of the dynamic 1H NMR behaviour of the cis and trans isomers of [Pd(OAc)(CH2C9H6N]2 formed from 8-methylquinoline. Evidence is presented that the cyclopalladation reaction takes place for a three-coordinate palladium(II) intermediate with the reacting hydrocarbon group entering the vacated fourth coordination site
8-甲基喹啉和8-乙基喹啉通过在8位取代基处的C H键断裂,使乙酸钯与钯发生环钯反应,但8-异丙基喹啉却没有。描述了在这些喹啉中引入2-取代基(Me,Br,CHO,CH 3 NMe,CH 2 OH,CO 2 H)对环金属化的影响。前三个取代基完全阻止环钯反应,而当2个取代基为CHNMe,CH 2 OH或CO 2 H时,在8个取代基处的金属化反应平稳进行。产物的光谱特征和动态1 H NMR的讨论[Pd(OAc)(CH 2 C 9)的顺式和反式异构体的化学行为由8-甲基喹啉形成的H 6 N] 2。证据表明,三配位钯(II)中间体发生环钯反应,反应的烃基进入空出的第四配位点。
DEEMING A. J.; ROTHWELL I. P., J. ORGANOMETAL. CHEM., 1981, 205, NO 1, 117-131