Syntheses of antifungal isocoumarins. II. Synthesis and antifungal activity of 3-substituted isocoumarins.
作者:KOOHEI NOZAWA、MIKIKO YAMADA、YOSHIKO TSUDA、KENICHI KAWAI、SHOICHI NAKAJIMA
DOI:10.1248/cpb.29.2491
日期:——
Various 3-arylisocoumarins (5, 6, 8, 10, 11, and 12) were simply prepared in high yields by heating homophthalic acids (1-4) with aromatic acyl chlorides. 8-Hydroxy-3-phenylisocoumarin (17) and 8-acetoxy-3-phenylisocoumarin (18), and 8-hydroxy-3-(p-methoxyphenyl) isocoumarin (19) were obtained by alkaline hydrolysis of 10 and 11, respectively, followed by treatment with acetic anhydride. 3, 4-Dihydro-8-hydroxy-3-phenyl-isocoumarin (24) was prepared from 10 by alkaline hydrolysis followed by reduction with sodium borohydride then heating with acetic anhydride. 3-(p-Hydroxyphenyl)-isocoumarin (7), 8-hydroxy-3-(p-hydroxyphenyl) isocoumarin (9), 5-chloro-8-hydroxy-6-methoxy-3-phenylisocoumarin (13), and 3, 4-dihydro-3-(p-hydroxyphenyl) isocoumarin (23) were prepared by demethylation of 6, 8, 12 and 22, respectively. All the prepared isocoumarins and some other isocoumarin derivatives (25-30) were examined in vitro for antifungal activity. The structure-activity relationships are discussed.
通过加热均苯二甲酸(1-4)和芳香酰基氯,可以简单地高产率制备出各种 3-芳基异香豆素(5、6、8、10、11 和 12)。8- 羟基-3-苯基异香豆素(17)和 8-乙酰氧基-3-苯基异香豆素(18)以及 8-羟基-3-(对甲氧基苯基)异香豆素(19)分别是通过碱水解 10 和 11,然后用乙酸酐处理而得到的。3,4-二氢-8-羟基-3-苯基异香豆素(24)是由 10 通过碱性水解,然后用硼氢化钠还原,再用乙酸酐加热制备的。3-(对羟基苯基)-异香豆素(7)、8-羟基-3-(对羟基苯基)异香豆素(9)、5-氯-8-羟基-6-甲氧基-3-苯基异香豆素(13)和 3,4-二氢-3-(对羟基苯基)异香豆素(23)分别由 6、8、12 和 22 脱甲基制备而成。对所有制备的异香豆素及其他一些异香豆素衍生物(25-30)进行了体外抗真菌活性检测。本文对其结构-活性关系进行了讨论。