Expedient synthesis of 3-hydroxyisoquinolines and 2-hydroxy-1,4-naphthoquinones via one-pot aryne acyl-alkylation/condensation
作者:Kevin M. Allan、Boram D. Hong、Brian M. Stoltz
DOI:10.1039/b913336d
日期:——
A convenient method is disclosed for the synthesis of both 3-hydroxyisoquinolines and 2-hydroxy-1,4-naphthoquinones from β-ketoesters using a one-pot aryne acyl-alkylation/condensation procedure. When performed in conjunction with a one-step method for the synthesis of the β-ketoester substrates, this method provides a new route to these polyaromatic structures in only two steps from commercially available carboxylic acid starting materials. The utility of this approach is demonstrated in the synthesis of the atropisomeric P,N-ligand, QUINAP.
Naturally occurring quinones. Part VII. Synthesis of spinochrome E
作者:H. A. Anderson、R. H. Thomson
DOI:10.1039/j39660000426
日期:——
Spinochrome E. hexahydroxy-1,4-naphthaquinone, has been synthesised via condensation of 3,4,5,6-tetramethoxyphthalaldehyde with glyoxal.
通过3,4,5,6-四甲氧基邻苯二甲醛与乙二醛的缩合反应合成了Spinochrome E. hexahydroxy-1,4-萘醌。
Use of cationic azacyanine dyes for coloring keratin fibers
申请人:Javet Manuela
公开号:US20070022545A1
公开(公告)日:2007-02-01
The present invention relates to the use of cationic azacyanine dyes of the formula (Ia) or (Ib) for coloring keratin fibers, and to a method of coloring hair with various degrees of damage.
Cationic azacyanine dyes and coloring agents containing said dyes
申请人:Javet Manuela
公开号:US20070220685A1
公开(公告)日:2007-09-27
The present invention relates to agents containing cationic azacyanine dyes having formula (I) for dyeing fibers, such as, for example, keratin fibers, wool, silk or fleeces, and in particular human hair, as well as to new asymmetrical azacyanine dyes.
The present invention relates to agents comprising cationic azacyanine dyes of the formula (I) for coloring keratin fibers, such as, for example, wool, silk or furs and in particular human hair
(where X1 is N—R1, O or S and X2 is N—R2, O or S), and to a method of coloring hair with varying degrees of damage.