Sterically controlled C–H alkenylation of pyrroles and thiophenes
作者:Eunsu Kang、Ju Eun Jeon、Siyeon Jeong、Hyun Tae Kim、Jung Min Joo
DOI:10.1039/d1cc04378a
日期:——
Pd-catalyzed C–H alkenylations targeting the least hindered position of N-alkyl pyrroles and 3-substituted thiophenes, as opposed to electronically controlled approaches, are developed. The steric demand and stable bidentate binding mode of the pyrazolonaphthyridine ligand are key to the success of these sterically controlled alkenylations using oxygen as an oxidant.
Bis(acetato-O)bis(pyridine-N)palladium(II) Monohydrate and Bis(acetato-O)bis(diethylamine-N)palladium(II)
作者:S. V. Kravtsova、I. P. Romm、A. I. Stash、V. K. Belsky
DOI:10.1107/s0108270196005732
日期:1996.9.15
The title complexes, [Pd(C2H3O2)(2)(C5H5N)(2)].H2O, (I), and [Pd(C2H3O2)(2)(C4H11N)(2)], (II), are typical of metal acetates with additional N-donor coordination. In both structures, the central Pd atom has a centrosymmetric square-planar environment. In the pyridine complex (I), carbonyl O atoms are involved in intermolecular O-H ... O hydrogen bonds with water molecules and in the amine complex (II), they participate in intramolecular N-H ... O hydrogen bonds. Owing to the latter, the Pd-N bond lengths are different with values of 2.010 (4) for complex (I) and 2.066 (2) Angstrom for complex (II).