Certain 5-substituted chromones and thiochromones and pharmacologically acceptable salts thereof are disclosed. The compounds possess antiallergic properties and are represented by the formula:
wherein:
X is selected from the group consisting of -0-, -S-, and -SO2-;
R1 and R2 are each independently H or lower alkyl having from 1 to 4 carbon atoms or together with C2 and C3 from a cyclohexane ring having the structure:
wherein R3 and R4 are each independently H or a lower alkyl having from 1 to 4 carbon atoms.
Also taught are valuable intermediates useful in the preparation of said 5-substituted chromones and thiochromones represented by the formula:
wherein B is selected from the group consisting of - NHCOC(CH3)3, 1, 3-oxazolinyl and -CONHR, wherein R is methyl, phenyl, or t-butyl; Y is selected from the group consisting of C02H, CHO, CO2R' and COR', wherein R' is a lower alkyl having from 1 to 4 carbon atoms; and A is H or tetrahydropyran.
本发明公开了某些 5-取代的
色酮和
硫代
色酮及其药理学上可接受的盐。这些化合物具有抗过敏特性,并由式表示: 其中:
X选自由-0-、-S-和-SO2-组成的组;R1和R2各自独立地为H或具有1至4个碳原子的低级烷基,或与C2和C3一起来自具有以下结构的
环己烷环: 其中R3和R4各自独立地为H或具有1至4个碳原子的低级烷基。
本发明还教导了用于制备所述 5-取代
色酮和
硫代
色酮的有价值的中间体,其式如下: 其中 B 选自 NHCOC(
CH3)3、1,3-
噁唑啉基和-CONHR 组成的组,其中 R 是甲基、苯基或叔丁基;Y 选自 C02H、CHO、CO2R'和 COR'组成的组,其中 R' 是具有 1 至 4 个碳原子的低级烷基;以及 A 是 H 或
四氢吡喃。