申请人:Beecham Group Limited
公开号:US04062870A1
公开(公告)日:1977-12-13
Compounds of the formula ##STR1## wherein R.sub.3 is hydrogen, halogen, alkyl of 1 to 6 carbon atoms, alkenyl of 2 to 6 carbon atoms, alkoxyl of 1 to 6 carbon atoms, alkenyloxyl of 2 to 6 carbon atoms, alkylthio of 1 to 6 carbon atoms, hydroxyl, amino, alkylamino of 1 to 6 carbon atoms, dialkylamino of 1 to 6 carbon atoms, nitro, trifluoromethyl, acylamino of 2 to 7 carbon atoms, alkoxysulphonylamino of 1 to 6 carbon atoms, carboxyl, nitrile, AOR.sub.4, ASR.sub.7, ASO.sub.2 R.sub.7, ANHR.sub.7, ANR.sub.7 COR.sub.8, ANR.sub.7 SO.sub.2 R.sub.8 or ANR.sub.7 CO.sub.2 R.sub.8, wherein A is alkylene of 1 to 4 carbon atoms, R.sub.7 is alkyl of 1 to 4 carbon atoms and R.sub.8 is alkyl of 1 to 4 carbon atoms; R.sub.4 is hydrogen or halogen; or R.sub.3 together with R.sub.4 forms a --CH.dbd.CH--CH.dbd.CH--, --NH--CH.dbd.CH--, --CH.sub.2 --CH.sub.2 --CH.sub.2 --CH.sub.2 -- or --CH.sub.2 --CH.sub.2 --CH.sub.2 --CO-- system; R.sub.5 is hydrogen, alkyl of 1 to 6 carbon atoms or phenyl; and R.sub.5 is hydrogen, alkyl of 1 to 6 carbon atoms or phenyl. Are useful as intermediates for producing derivatives of trans-3-hydroxy-4-amino-chroman which derivatives are useful for their blood pressure lowering activity and anti-hypertensive activity. CROSS-REFERENCE
化合物的公式为##STR1##其中R.sub.3是氢,卤素,1至6个碳原子的烷基,2至6个碳原子的烯基,1至6个碳原子的烷氧基,2至6个碳原子的烯氧基,1至6个碳原子的烷硫基,羟基,氨基,1至6个碳原子的烷基氨基,1至6个碳原子的二烷基氨基,硝基,三氟甲基,2至7个碳原子的酰胺基,1至6个碳原子的烷氧基磺酰胺基,羧基,腈基,AOR.sub.4,ASR.sub.7,ASO.sub.2 R.sub.7,ANHR.sub.7,ANR.sub.7 COR.sub.8,ANR.sub.7 SO.sub.2 R.sub.8或ANR.sub.7 CO.sub.2 R.sub.8,其中A是1至4个碳原子的烷基,R.sub.7是1至4个碳原子的烷基,R.sub.8是1至4个碳原子的烷基;R.sub.4是氢或卤素;或R.sub.3与R.sub.4形成--CH.dbd.CH--CH.dbd.CH--,--NH--CH.dbd.CH--,--CH.sub.2--CH.sub.2--CH.sub.2--CH.sub.2--或--CH.sub.2--CH.sub.2--CH.sub.2--CO--系统;R.sub.5是氢,1至6个碳原子的烷基或苯基;R.sub.5是氢,1至6个碳原子的烷基或苯基。它们可用作生产转-3-羟基-4-氨基-香豆素衍生物的中间体,这些衍生物对于其降低血压活性和抗高血压活性非常有用。交叉参考