| 摘要 |
<p>Compounds of the formula:- <IMAGE> in which X represents the group <IMAGE> or <IMAGE> R2 represents hydrogen or a C1-C6-alkyl group and R3 represents hydrogen or a hydroxy group whilst R1 represents the adamantyl radical or a saturated or monounsaturated C3-C16-cycloalkyl radical which may be substituted by a C1-C4-alkyl group or by a halogen atom, and their acid addition salts are prepared by reacting corresponding N,N'-methylene- bis-oxazolidines with ketones of the formula R1-CO-C(R2)H2 in acid medium, optionally followed by reduction.</p> |
