申请人:SANWA KAGAKU KENKYUSHO CO., LTD.
公开号:EP0703233A2
公开(公告)日:1996-03-27
There is disclosed a process for the preparation of 5-substituted-1-azabicyclo[3.3.0]octanes of the Formula
wherein R¹ is a cyano radical or group of -CO₂R³, in which R³ is a lower alkyl group.
The derivative is prepared by reacting 1,7-disubstituted-4-heptanone of the Formula
wherein X is a chlorine, bromine or iodine atom, or a group of -OSO₂R, in which R is a methyl, tolyl or tri-fuloromethyl radical,
with a substituted acetic acid derivative of the Formula
R¹CH₂CO₂Y
wherein R¹ has the meaning as referred to; and Y is a hydrogen, sodium or potassium atom, or -NH₄,
an alkali metal salt or ammonium salt of the derivative, in the presence of ammonia. Among the 5-substituted-1-azabicyclo[3.3.0]octanes, 5-cyanomethyl-1-azabicyclo[3.3.0]octane can be converted into 5-(2-aminoethyl)-1-azabicyclo[3.3.0]octane through a catalystic reduction which is carried out in atmospheric pressure, in alkali condition, and in the presence of Raney nickel.
本发明公开了一种制备 5-取代的-1-氮杂双环[3.3.0]辛烷的工艺,其式为
其中 R¹ 为氰基或 -CO₂R³ 基团,其中 R³ 为低级烷基。
该衍生物的制备方法是将式中的 1,7-二取代-4-庚酮反应为
其中 X 是氯、溴或碘原子,或 -OSO₂R 的基团,其中 R 是甲基、甲苯基或三氟氯甲基基、
式中的取代乙酸衍生物
R¹CH₂CO₂Y
其中,R¹ 具有所述含义;Y 是氢、钠或钾原子,或 -NH₄、
的碱金属盐或铵盐。在 5-取代的-1-氮杂双环[3.3.0]辛烷中,5-氰甲基-1-氮杂双环[3.3.0]辛烷可通过催化剂还原转化为 5-(2-氨基乙基)-1-氮杂双环[3.3.0]辛烷,还原反应在常压、碱条件和雷尼镍存在下进行。