Process for the preparation of racemic ([2S[2R*[R[R*]]]]- and ([2R[2S*[S[S*]]]]-(±)- α,α' -[imino-bis(methylene)]bis[6-fluorochroman-2-methanol] of the compound of the formula (I) and its pure ([2S[2R*[R[R*]]]]- and ([2R[2S*[S[S*]]]]- enantiomer compounds characterized in that the products are prepared from 4-fluoro-phenole or 4-fluoro-anisole via crystalline, optically active intermediates.
用于制备化合物(I)的混合对映体([2S[2R*[R[R*]]]]-和([2R[2S*[S[S*]]]]-(±)- α,α' -[
亚胺-双(亚甲基)]双[6-
氟基-色苷-2-
甲醇]的过程及其纯度([2S[2R*[R[R*]]]]-和([2R[2S*[S[S*]]]]-对映体化合物的特征在于所述产物是从
4-氟苯酚或4-
氟苯甲醚经过结晶的、具有光学活性的中间体制备而成。