METHOD FOR INDUSTRIALLY PREPARING NITROGEN SUBSTITUTED AMINO-5,6,7,8-TETRAHYDRONAPHTHOL

摘要

A method for industrially preparing a nitrogen substituted 6-amino-5,6,7,8-tetrahydronaphthol is disclosed. The method comprises reacting a nitrogen substituted amino-5,6,7,8-tetrahydronaphthol compound of formula (II) with a 2-substituted ethyl sulfonate compound of formula (III) under an alkaline condition and in the presence of a sulfite.