2,β-dinitro-4,5-dibenzyloxystyrene 、 三氟乙酸 以In a second stage 5,6-dihydroxyindole is obtained from 4,5-dihydroxy-2,β-dinitrostyrene as indicated above (U.S的产率得到5,6-二羟基吲哚
参考文献:
名称:
Process for the preparation of 5,6-dihydroxyindole and intermediate
Process for the preparation of 5,6-dihydroxyindole and intermediate
申请人:L'Oreal
公开号:US05410067A1
公开(公告)日:1995-04-25
Process for the preparation of 5,6-dihydroxyindole, wherein the compound of formula: ##STR1## in which R' denotes a hydrogen atom or an optionally substituted benzyl radical, is subjected either to the action of hydrogen under pressure or to a hydrogen transfer operation, in a solvent medium and in the presence of a hydrogenation catalyst.