Bis-o-aminophenols and processes for producing bis-o-aminophenols
申请人:——
公开号:US20040049081A1
公开(公告)日:2004-03-11
A bis-o-aminophenol has a formula I
1
These bis-o-aminophenols permit the preparation of polybenzoxazoles stabilized at high temperatures. The bis-o-aminophenols are preferably prepared from the corresponding diols, which are first nitrosated. The nitroso compound is then reduced to the amino compound by hydrogenation with Pd/C and H
2
.