New Potato Micro-Tuber-Inducing Cyclohexene Compounds Related to Theobroxide from<i>Lasiodiplodia theobromae</i>
作者:Ryo TAKEI、Kosaku TAKAHASHI、Hideyuki MATSUURA、Kensuke NABETA
DOI:10.1271/bbb.80171
日期:2008.8.23
Two new cyclohexene compounds related to theobroxide (3) were isolated from the mycelia of Lasiodiplodia theobromae OCS71. The structures of these compounds were determined to be (4S,5S)-4,5-dihydroxy-2-methyl-cyclohex-2-enone (1) and (3aS,4R,5S,7aR)-4,5-dihydroxy-7-methyl-3a,4,5,7a-tetrahydrobenzo[1,3]dioxol-2-one (2) by means of spectroscopic analyses and chemical correlation to 3. Compound 2 was shown to take up the carbonate ion to form a carbonic acid ester non-enzymatically. The compounds also showed potato micro-tuber-inducing activities at a concentration of 10−3 m, using a culture of single-node segments of potato stems in vitro.
从 Lasiodiplodia theobromae OCS71 的菌丝体中分离出两种与可可碱(3)有关的新环己烯化合物。通过光谱分析和与 3 的化学相关性,确定这些化合物的结构为 (4S,5S)-4,5-二羟基-2-甲基-环己-2-烯酮 (1) 和 (3aS,4R,5S,7aR)-4,5-二羟基-7-甲基-3a,4,5,7a-四氢苯并[1,3]二恶茂-2-酮 (2)。结果表明,化合物 2 可以非酶促方式吸收碳酸根离子,形成碳酸酯。利用马铃薯茎单节段的离体培养,在 10-3 m 的浓度下,化合物还显示出马铃薯微瘤胃诱导活性。