A process for the preparation of substituted 3-(1-amino-2-methylpentane-3-yl)phenyl compounds which has advantages over conventional processes with respect to higher conversions and yields, flexibility, a shorter overall route, environmentally acceptable conditions, influence of stereoselectivity such as diastereoselectivity in a targeted manner and at least partial suppression of the formation of undesired side-products and/or undesired stereoisomers, in particular undesired diastereomers.