Conversion of tributylstannylferrocene to a variety of heteroaryl ferrocenes
作者:Chao-Min Liu、Bao-Hua Chen、Wan-Yi Liu、Xiao-Li Wu、Yong-Xiang Ma
DOI:10.1016/s0022-328x(99)00733-0
日期:2000.4
Tributylstannylferrocene (Fc-SnBu3) was converted to a variety of heteroaryl ferrocenes, such as 2-thiophenyl, 3-thiophenyl, 3-pyridyl, 3-quinolyl, 4-oxazolyl and 4-isoxazolyl ferrocene, by using Pd-catalyzed reactions. The Stille-coupling catalyst (PdCl2-PPh3) promotes the reaction between Fc-SnBu3 and electron-deficient heterocyclic bromides, while a modified catalyst (Pd-Ph3P-CuO) proves to be the choice for the coupling of Fc-SnBu3 with electron-rich heterocyclic bromides. (C) 2000 Elsevier Science S.A. All rights reserved.
Bromo-6-methoxy-8-aminoquinolines: Preparation and 13C-NMR Assignments
作者:James D. McChesney、S. Sarangan、Charles D. Hufford
DOI:10.1002/jps.2600731256
日期:1984.12
Preparation of all possible monobromo-6-methoxy-8-aminoquinolines is reported. These materials provided an opportunity to assess the effect of bromine substitution on 13C-NMR chemical shift patterns. An explanation of the isomerization of 5-bromo-6-methoxy-8-acetamidoquinoline to 7-bromo-6-methoxy-8-aminoquinoline during hydrolysis is presented.