申请人:John Wyeth & Brother Limited
公开号:US04526970A1
公开(公告)日:1985-07-02
An improved process for preparing tetrahydroquinolines and related compounds especially 5,6,7,8-tetrahydroquinoline-8-nitriles, amides and thioamides is described. The nitriles and thioamides are anti-ulcer and/or anti-secretory agents. Typically a compound of formula A ##STR1## where M is sodium, potassium, lithium or MgHal where Hal is chlorine, bromine or iodine, is reacted, e.g., in an ether solvent, with a silyl compound R.sub.x.sup.a Si(NCY).sub.4-x (III) wherein R.sup.a is alkyl, cycloalkyl, aralkyl, or aryl, at least one group R.sup.a being a branched chain alkyl, cycloalkyl, aryl or branched chain aralkyl, Y is oxygen or sulphur, x has a value from 1 to 3, then subjecting the product to hydrolysis or alcoholysis, to obtain the corresponding nitrile, amide or thioamide, provided that when a nitrile is desired the molar ratio of compound III to compound A is at least 2:1 and x is 3 and Y is S. The products may be obtained as acid addition salts. Compound A may contain various substituents, e.g., hydrocarbon substituents. Some compounds of formula III are novel and are also claimed.
本发明涉及一种改进的制备四氢喹啉和相关化合物,尤其是5,6,7,8-四氢喹啉-8-腈、酰胺和硫酰胺的过程。腈和硫酰胺是抗溃疡和/或抗分泌剂。通常,化合物A的公式为##STR1##其中M是钠、钾、锂或MgHal,其中Hal是氯、溴或碘,与硅基化合物R.sub.x.sup.a Si(NCY).sub.4-x (III)反应,在醚溶剂中,其中R.sup.a是烷基、环烷基、芳基烷基或芳基,至少有一个基团R.sup.a是支链烷基、环烷基、芳基或支链芳基烷基,Y是氧或硫,x的值为1到3,然后将产物经过水解或醇解,以获得相应的腈、酰胺或硫酰胺,当需要腈时,化合物III对化合物A的摩尔比为至少2:1,x为3,Y为S。所得产物可以作为酸加成盐获得。化合物A可以含有各种取代基,例如烃基取代基。公式III的某些化合物是新颖的,也被要求。