Synthesis and Biological Activities of 4-Chloroindole-3-acetic Acid and Its Esters
作者:Masato KATAYAMA
DOI:10.1271/bbb.64.808
日期:2000.1
4-Chloroindole-3-acetic acid (4-Cl-IAA) and its esters were synthesized from 2-chloro-6-nitrotoluene as the starting material. The biological activities of 4-Cl-IAA and its esters were determined by four bioassays. Except for the tert-butyl ester, 4-Cl-IAA and its esters had stronger elongation activity toward Avena coleoptiles than had indole-3-acetic acid. The biological activities of the methyl, ethyl and allyl esters were as strong as the activity of the free acid. All the esters, except for the tert-butyl, inhibited Chinese cabbage hypocotyl growth more than the free acid did, and all the esters induced severe swelling and formation of numerous lateral roots in black gram seedlings even at a low concentration. Furthermore, adventitious root formation was strongly promoted in Serissa japonica cuttings by all the esters. The root formation-promoting activities of the ethyl and allyl esters were about three times the value for indole-3-butyric acid which is used to promote and accelerate root formation in plant cuttings.
4-氯吲哚-3-乙酸(4-Cl-IAA)及其酯类以2-氯-6-硝基甲苯为原料合成。通过四种生物测定法确定了4-Cl-IAA及其酯类的生物活性。除了叔丁酯外,4-Cl-IAA及其酯类对燕麦胚芽鞘的伸长活性比吲哚-3-乙酸更强。甲基、乙基和烯丙基酯类的生物活性与游离酸的活性相当。除了叔丁酯外,所有酯类抑制大白菜胚轴生长的能力都强于游离酸,而且所有酯类即使在低浓度下也能诱导黑豆幼苗严重膨胀并形成大量侧根。此外,所有酯类都能显著促进Serissa japonica插条不定根的形成。乙基和烯丙基酯类的促根活性约为吲哚-3-丁酸的三倍,而吲哚-3-丁酸可用于促进和加速植物插条生根。