CuBr/rac-BINOL-Catalyzed N-Arylations of Aliphatic Amines at Room Temperature
摘要:
We have developed an efficient and readily available catalyst system CuBr/racemic BINOL (1,1'-binaphthyl-2,2'-diol) that catalyzes N-arylation of aliphatic amines at room temperature, and this inexpensive catalyst system is of high selectivity and tolerance toward various functional groups in the substrates.
Novel hair coloring compositions for use in oxidative hair dyeing
申请人:Lim Mu'lll
公开号:US20050188480A1
公开(公告)日:2005-09-01
Hair dyeing compositions are provided which comprise at least one coupler selected from N-aryl-m-phenylenediamine derivatives, 2-substituted N-aryl-m-phenylenediamine derivatives, and N-aryl-m-diaminopyridine derivatives, in combination with and at least one diaminopyrazole primary intermediate.
The present invention provides a compound of formula (I)
or its salts or pharmaceutically acceptable derivatives thereof, wherein R
1
, R
2
, R
3
, R
4
, R
5
, X
1
, and j are defined herein. The compounds are useful as potassium ion channel inhibitors.
Novel hair colouring compositions for use in oxidative hair dyeing
申请人:The Procter & Gamble Company
公开号:EP1982748A2
公开(公告)日:2008-10-22
Hair dyeing compositions are provided which comprise at least one coupler selected from 2-substituted N-aryl-m-phenylenediamine derivatives, in combination with and at least one diaminopyrazole primary intermediate.