This invention provides a process for the stereospecific preparation of 2-yl-chroman and -chromene derivatives of the formula:
1
These compounds are useful for the preparation of optically active 2-aminomethyl- and 2-azaheterocyclylmethyl-chromans.
本发明提供了一种立体特异性制备式为1的2-基-色基和-色烯衍
生物的过程:
这些化合物可用于制备光学活性的2-
氨甲基-和2-氮杂杂环基甲基-色基。