The palladium(II)-catalyzed cyclization of the urethane 8, which was derived from D-mannitol, gave the cyclic compound 9 with excellent diastereoselectivity. During these transformations, the Pd(II) species are not reduced and thus the catalyst can recycle without its reoxidation. The cycloadduct 9 was converted to 1-deoxymannojirimycin.
Die Iodaniline (I) reagieren mit dem Lactam (II) bzw. den Aminen (VII) und Kohlenmonoxid (III) in Gegenwart des aus (IV) und (V) gebildeten Katalysatorsystems in HMPA zu den Chinazolinon‐Derivaten (VI), (IX), (XI) bzw. (XII).
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