Compounds of formula ##STR1## where R is 5-indanyl or a carboxylic acid protecting group, or an amine salt thereof, are prepared by hydrogenating an (E)-allylic ether of formula ##STR2## in the presence of a stereoselective rhodium or ruthenium biphosphine catalyst and a protic solvent.
化合物的公式为##STR1##其中R是5-
吲哚基或
羧酸保护基,或其胺盐,通过在立体选择性的
铑或
钌双膦催化剂和质子溶剂的存在下氢化公式为##STR2##的(E)-
烯丙基醚制备。