申请人:John Wyeth & Brother Ltd.
公开号:US04593111A1
公开(公告)日:1986-06-03
The invention concerns novel compounds of formula IIIA R.sub.x.sup.a Si(NCS).sub.4-x IIIA wherein R.sup.a is selected from electron donating substituents consisting of alkoxy of 1-10 carbon atoms, cycloalkoxy of 4-8 carbon atoms, aralkoxy of 7-12 carbon atoms, phenoxy which may be substituted by alkyl of 1-10 carbon atoms, alkoxy of 1-10 carbon atoms or trifluoromethyl, the group R.sup.b R.sup.c N-wherein R.sup.b and R.sup.c are selected from alkyl of 1-6 carbon atoms, cycloalkyl of 4-6 carbon atoms, phenyl which may be substituted by alkyl of 1-10 carbon atoms, alkoxy of 1-10 carbon atoms or trifluoromethyl, and aralkyl of 7-12 carbon atoms or R.sup.b and R.sup.c may be joined to form a pyrrolidinyl or piperidinyl ring with the nitrogen atom, which ring may be substituted by alkyl of 1-10 carbon atoms; alkylthio of 1-10 carbon atoms, cycloalkylthio of 4-8 carbon atoms, aralkylthio of 7-12 carbon atoms, phenylthio which may be substituted by alkyl of 1-10 carbon atoms, alkoxy of 1-10 carbon atoms, or trifluoromethyl, and hydrocarbon substituents selected from alkyl of 1-10 carbon atoms, cycloalkyl of 4-8 carbon atoms, aralkyl of 7-12 carbon atoms, or phenyl which may be substituted by alkyl of 1-10 carbon atoms, alkoxy of 1-10 carbon atoms or trifluoromethyl, at least one group R.sup.a being an electron donating substituent with the provisos that: (i) when x is 3 and all three R.sup.a groups are the same alkoxy then the alkoxy group has at least 3 carbon atoms; (ii) when R.sup.a is alkoxy and x is 1 then R.sup.a is other than propoxy; (iii) when one or more R.sup.a are alkylthio and the others (if any) are alkyl then the alkylthio group has at least 2 carbon atoms; (iv) when R.sup.a is aryloxy and x is 3 then at least one group R.sup.a is other than aryloxy. The compounds are useful intermediates in an improved process for preparing fused carbocyclic ring derivatives of pyridine especially 5,6,7,8-tetrahydroquinoline 8-nitriles and thioamides which is described in co-pending U.S. Ser. No. 506,278. The nitriles and thioamides are anti-ulcer and/or anti-secretory agents.
本发明涉及化合物IIIa R.sub.x.sup.a Si(NCS).sub.4-x IIIa,其中R.sup.a从电子给体取代物中选择,包括1-10个碳原子的烷氧基,4-8个碳原子的环烷氧基,7-12个碳原子的芳基烷氧基,苯氧基,可以被1-10个碳原子的烷基,1-10个碳原子的烷氧基或三氟甲基取代的苯氧基,以及R.sup.b R.sup.c N-基,其中R.sup.b和R.sup.c从1-6个碳原子的烷基,4-6个碳原子的环烷基,可以被1-10个碳原子的烷基,1-10个碳原子的烷氧基或三氟甲基取代的苯基,7-12个碳原子的芳基烷基中选择,或者R.sup.b和R.sup.c可以连接成一个吡咯啉基或哌啶基,与氮原子形成一个环,该环可以被1-10个碳原子的烷基取代;1-10个碳原子的烷基硫,4-8个碳原子的环烷基硫,7-12个碳原子的芳基烷基硫,可以被1-10个碳原子的烷基,1-10个碳原子的烷氧基或三氟甲基取代的苯基硫,以及从1-10个碳原子的烷基,4-8个碳原子的环烷基,7-12个碳原子的芳基烷基或可以被1-10个碳原子的烷基,1-10个碳原子的烷氧基或三氟甲基取代的苯基选取的烃基取代物,至少一个R.sup.a基团是电子给体取代物,但需注意以下条件:(i)当x为3且三个R.sup.a基团都是相同的烷氧基时,烷氧基至少有3个碳原子;(ii)当R.sup.a是烷氧基且x为1时,R.sup.a不是丙氧基;(iii)当一个或多个R.sup.a是烷基硫基且其他基团(如果有)是烷基时,烷基硫基至少有2个碳原子;(iv)当R.sup.a是芳氧基且x为3时,至少有一个R.sup.a基团不是芳氧基。这些化合物是制备吡啶融合环衍生物特别是5,6,7,8-四氢喹啉8-腈和硫酰胺的改进过程中有用的中间体,该过程在共同申请的美国专利申请号506,278中描述。这些腈和硫酰胺是抗溃疡和/或抗分泌剂。