申请人:E. R. Squibb & Sons, Inc.
公开号:US04252945A1
公开(公告)日:1981-02-24
A process is provided for preparing pyrazolo-[1,5-c]quinazoline derivatives of the structure ##STR1## wherein X is O or S; R.sup.1 is hydrogen, lower alkyl, hydroxymethyl, phenyl-lower alkyl, phenyl or phenyl substituted with halogen, lower alkyl, lower alkoxy, or trifluoromethyl; R.sup.2 is lower alkoxy, phenyl-lower alkoxy, phenoxy, or phenoxy substituted with lower alkyl or lower alkoxy; and R.sup.3 and R.sup.4 are the same or different and are selected from the group consisting of hydrogen, alkyl of 1 to 4 carbons, alkoxy of 1 to 4 carbons, lower alkanoyloxy of 1 to 4 carbons, nitro, benzyloxy, benzyloxy having a single monolower alkoxy substituent, halogen, hydroxy, and trifluoromethyl, wherein quinolone compounds of the structure ##STR2## which are new intermediates, are reacted with a hydrazine compound to form a 5-(2-aminophenyl)-pyrazole which is then cyclized to the product. In addition, the above product may be reacted with a halogen acid to form the corresponding hydroxymethyl compound.
提供了一种制备
吡唑并[1,5-c]
喹唑啉衍
生物的过程,其结构为##STR1##其中X为O或S;R.sup.1为氢、低烷基、羟甲基、苯基-低烷基、苯基或取代有卤素、低烷基、低烷氧基或三
氟甲基的苯基;R.sup.2为低烷氧基、苯基-低烷氧基、苯氧基或取代有低烷基或低烷氧基的苯氧基;R.sup.3和R.sup.4相同或不同,选自氢、1至4个碳的烷基、1至4个碳的烷氧基、1至4个碳的低烷酰氧基、硝基、苄氧基、单一单低烷氧基取代的苄氧基、卤素、羟基和三
氟甲基的群,其中结构为##STR2##的
喹啉化合物是新的中间体,可与
肼类化合物反应形成5-(2-
氨基苯基)-
吡唑,然后环化为产物。此外,上述产物还可以与卤素酸反应形成相应的羟甲基化合物。