Darstellung einiger substituierter Triphthaloyl-benzole als Ausgangsmaterialien für grüne Küpenfarbstoffe
作者:H. E. Fierz-David、L. Blangey、W. Von Krannichfeldt
DOI:10.1002/hlca.19470300317
日期:1947.4.30
Durch Kondensation entsprechend substituierter 1,4-Naphtho-chinone mittels Pyridin wurden das α-Trichlor-, α, α′-Hexachlor-, α- und β-Triacetamino- sowie das β-Trimethoxy-triphthaloyl-benzol neu hergestellt.
Chloroanthraquinones were found to undergo facile Suzuki–cross coupling with substituted phenyl boronic acids using a commercial catalyst Pd(PPh3)4 and with Pd(PPh3)4 prepared in situ from Pd(PPh3)2Cl2 and PPh3.
Brominated Thiophenes as Precursors in the Preparation of Brominated and Arylated Anthraquinones
作者:Thies Thiemann、Yasuko Tanaka、Jesus Iniesta
DOI:10.3390/molecules14031013
日期:——
Brominated anthraquinones can be synthesized directly from bromothiophenes when these are reacted with 1,4-naphthoquinones in the presence of meta-chloroperoxy-benzoic acid. The bromoanthraquinones are versatile building blocks in the preparation of arylated anthraquinones and of extended π-systems with interspersed anthraquinone units.
Process for the production of an aromatic hydrazo compound
申请人:TOYO INK MANUFACTURING CO., LTD.
公开号:EP0391606A1
公开(公告)日:1990-10-10
A process for the production of an aromatic hydrazo compound, which comprises carrying out catalytic reduction of an aromatic nitro compound with hydrogen in an alkali metal hydroxide aqueous solution in the presence of a noble metal catalyst at a high temperature under a high pressure, wherein the catalytic reduction is carried out by using, as a hydrogen-donating solvent, a cyclic hydrocarbon formed of 1 to 4 aromatic rings as a basic skeleton and having hydrogen atoms attached to at least two places of the aromatic ring(s).