A tetrahydroisoquinoline derivative represented by formula: ##STR1## wherein R.sup.1 represents hydrogen or methyl and X.sup.1, X.sup.2, Y.sup.1 and Y.sup.2 are defined as follows: (1) X.sup.1 represents --OH, ##STR2## or OR.sup.2 wherein R.sup.2 represents lower alkyl when X.sup.2, Y.sup.1 and Y.sup.2 represent hydrogen (2) X.sup.1 and X.sup.2 together form oxo (.dbd.O), when Y.sup.1 and Y.sup.2 represent hydrogen or (3) Y.sup.1 and Y.sup.2 together form oxo (.dbd.O), when X.sup.1 and X.sup.2 represent hydrogen which is useful as an intermediate in preparation of Cotarnine.
一种
四氢异喹啉衍
生物,其
化学式为:##STR1## 其中R.sup.1代表氢或甲基,X.sup.1,X.sup.2,Y.sup.1和Y.sup.2的定义如下:(1) X.sup.1代表--OH,##STR2## 或OR.sup.2,其中R.sup.2代表较低的烷基,当X.sup.2,Y.sup.1和Y.sup.2代表氢时;(2) X.sup.1和X.sup.2一起形成氧代 (.dbd.O),当Y.sup.1和Y.sup.2代表氢时;或(3) Y.sup.1和Y.sup.2一起形成氧代 (.dbd.O),当X.sup.1和X.sup.2代表氢时。该化合物是Cotarnine制备的中间体。