Synthesis of the silver(<scp>i</scp>) complex of CH<sub>2</sub>[CH(pz<sup>4Et</sup>)<sub>2</sub>]<sub>2</sub>containing the unprecedented [Ag(NO<sub>3</sub>)<sub>4</sub>]<sup>3−</sup>anion: A general method for the preparation of 4-(alkyl)pyrazoles
作者:Daniel L. Reger、James R. Gardinier、T. Christian Grattan、Monica R. Smith、Mark D. Smith
DOI:10.1039/b307306h
日期:——
two-step method for the syntheses of 4-(alkyl)pyrazoles has been developed. The first step involves the reaction between organyl diethylacetals and the Vilsmeier reagent to give a mixture of ethoxy- and dimethylamino- acroleins. This mixture reacts directly with hydrazine monohydrogenchloride to yield the desired (4-substituted)pyrazoles. The 4-(phenyl)pyrazole derivative exhibited a markedly lower solubility
METHODS OF PRODUCING 4-CYCLOALKYLOXYBENZENESULFONAMIDES
申请人:Daiichi Sankyo Company, Limited
公开号:EP3144300B1
公开(公告)日:2017-12-20
Electronic Communication in Oligometallic Complexes with Ferrocene-Based Tris(1-pyrazolyl)borate Ligands
作者:ShengLi Guo、Frank Peters、Fabrizia Fabrizi de Biani、Jan W. Bats、Eberhardt Herdtweck、Piero Zanello、Matthias Wagner
DOI:10.1021/ic001199j
日期:2001.9.1
Ferrocene-based tris(1-pyrazolyl)borate ligands 1R-Li and 1R-Tl have been synthesized and used to generate a variety of heterotrinuclear transition metal complexes, 3R-M [R = H, SiMe(3), cyclohexyl, (cyclohexyl)methyl, phenyl; M(II) = Mn, Fe, Co, Ni, Cu, Zn]. The poor solubility of 3H-M is greatly enhanced by the introduction of large organic substituents into the 4-positions of all pyrazolyl rings. The unsubstituted