| 摘要 |
<p>A process for preparation of heterocyclic compounds represented by the general formula (I), characterized by cyclizing an acetal (II) or an aldehyde (III) in the presence of a phosphoric acid compound in a molar amount below that of the acetal or the aldehyde; and a process for preparation of 1-substituted indoles represented by the general formula (VII), characterized by cyclizing an N-substituted anilinoacet- aldehyde acetal (VI) in the presence of an acid. (II) (III) (I) (VI) (VII) (In the formulae, R1, R2, R3, R4, R8, R9, R10, and X are each as defined in the description.)</p> |
