An efficient synthesis of quinolines, pyrimidines, quinoxalines, pyrroles, and aminomethylated aromatic compounds catalyzed by a well-defined Re(I) PNP pincer complex is described. All reactions proceed with liberation of dihydrogen and elimination of water. Under optimized reaction conditions a wide range of organic functional groups are tolerated. This study demonstrates that rhenium catalysts are
A Method for Pyrrole Synthesis through Intramolecular Cyclization of γ-Alkynyl Oximes Promoted by SmI2
作者:Songlin Zhang、Yiqiong Wang、Lingyu Zhang
DOI:10.1055/a-1932-5749
日期:2022.12
A new strategy for the synthesis of pyrrole through intramolecular cyclization of γ-alkynyl oximes promoted by SmI2 is reported for the first time. In contrast to the prior methods, the selection of oxime instead of oximeether or ester as substrate makes the synthetic method without accompaniment of organic waste (ArCO2H, AcOH, or ROH) because the hydroxyl group in oxime acts as the leaving group
The amino-Heck cyclization process has been applied into a range of gamma,delta-unsaturated ketone O-diethylphosphinyloximes 1 and delta,epsilon-unsaturated ketone O-diethylphosphinyloximes 7. Under the specific catalytic conditions developed by us, these substrates were found to preferentially undergo the 6-endo cyclization to give the formation of 2-substituted pyridines 3 and substituted methylpyridines 8, respectively, in moderate to good yields. Besides, several interesting aspects on the effects of phosphinyl groups, solvents, bases and molecular sieves on the regioselectivity of the cyclization of 1 have also been realized.
Synthesis of 2,5-disubstituted pyrroles by the reaction of ketoximes with 1,2-dibromopropane
作者:I. A. Aliev、B. R. Gasanov、S. N. Zeinalova、A. I. Mikhaleva
DOI:10.1007/bf00962525
日期:1988.9
ALIEV, I. A.;GASANOV, B. R.;ZEJNALOVA, S. N.;MIXALEVA, A. I., IZV. AN CCCP. CEP. XIM.,(1988) N 9, S. 2175-2177
作者:ALIEV, I. A.、GASANOV, B. R.、ZEJNALOVA, S. N.、MIXALEVA, A. I.