Palladium-Mediated Functionalization of Heteroaromatic Cations: Comparative Study on Quinolizinium Cations
作者:Domingo García-Cuadrado、Ana M. Cuadro、Bernardo M. Barchín、Ana Nuñez、Tatiana Cañeque、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1021/jo060634+
日期:2006.10.1
cross-coupling reaction on heteroaromatic cations is described. A comparative study of the Stille and Suzuki reactions shows that only the Stillereaction is able to produce an efficient C−C bond formation between any of the four isomeric bromoquinolizinium bromides and a variety of stannanes. In the presence of the catalysts Pd(PPh3)4 or Pd2(dba)3P(o-Tol)3, vinyl, ethynyl, aryl, and heteroaryl groups are
作者:Domingo García、Ana M. Cuadro、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1021/ol048368e
日期:2004.11.1
The four isomeric bromoquinolizium bromides reacted with aryl- and heteroarylacetylenes under Sonogashira conditions. The reactions proceed with moderate-to-high yields to afford aryl- and heteroarylethynyl quinolizium cations. This is the first reported example of the Sonogashira reaction on heteroaromatic cations, and it allowed easy access to potential pi-donor pi-acceptor systems bearing cationic units.
13C NMR spectra of some monosubstituted quinolizinium bromides
作者:A. Van Veldhuizen、M. Van Dijk、G. M. Sanders
DOI:10.1002/omr.1270210318
日期:1983.3
AbstractChemical shifts are reported for quinolizinium bromide and 12 monosubstituted derivatives, carrying a bromohydroxy, diethylamino or piperidino group as the substituent. In addition, 1J(CH) values and long‐range coupling constants are given.
Sanders, Georgine M.; Dijk, M. van; Plas, H. C. van der, Journal of Heterocyclic Chemistry, 1982, vol. 19, p. 797 - 800
作者:Sanders, Georgine M.、Dijk, M. van、Plas, H. C. van der
DOI:——
日期:——
SANDERS G. M.; DIJK M. VAN; PLAS H. C. VAN DER, HETEROCYCLES, 1981, 15, NO 1, SPEC. ISSUE, 213-223