The invention relates to processes for preparing a compound of the formula (X) and the enantiomer of said compound, wherein the benzoic acid moiety is attached at position 6 or 7 of the chroman ring, and R.sup.1, R.sup.2 and R.sup.3 are as defined herein. The invention further relates to intermediates that are useful in the preparation of the compound of formula (X). ##STR1##
这项发明涉及制备式(X)化合物及该化合物的对映体的过程,其中
苯甲酸基团附加在色苷环的6位或7位,并且R.sup.1、R.sup.2和R.sup.3如本文所定义。该发明还涉及在制备式(X)化合物过程中有用的中间体。