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A gram-scale separation of glucosinolates from an oil-pressed residue of rapeseeds using slow rotary countercurrent chromatography

机译:使用慢速旋转逆流色谱法从油菜籽油压榨残余物中克级芥子油苷的分离

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摘要

The myrosinase cleavage of glucosinolates yields thioglycosidic compounds that show cancer chemoprevention.Glucosinolates occupied about 5% of the oil-pressed residue of rapeseeds.The present study describes the separation of 3-butenyl-glucosinolate(G1)and 2-hydroxy-3-butenyl-glucosinolate(G2)from the extract of the oil-pressed residue of rapeseeds by using slow rotary countercurrent chromatography(SRCCC)with a solvent system composed of n-butanol-acetonitrile-10%(NH4)2SO4 water solution(1:0.5:2,v/v/v).The separation of 50 g crude extract by a SRCCC instrument equipped with a 22 L column yielded 0.91 g of 1 and 3.57 g of 2 in 37.5 h.The purity of the two compounds was more than 95%,determined by HPLC.The structures of compounds 1 and 2 were identified by ESI-MS,~1H NMR and 13C NMR.
机译:芥子油苷的黑芥子酶裂解产生硫糖苷化合物,具有化学预防癌症的作用,芥子油苷占菜籽油压榨残渣的5%左右,本研究描述了3-丁烯基-芥子油苷(G1)和2-羟基-3-丁烯基的分离油菜籽油压榨残渣中的硫代葡萄糖苷(G2),使用正丁醇-乙腈-10%(NH4)2SO4水溶液(1:0.5: 2,v / v / v)。用配备22 L色谱柱的SRCCC仪器分离50 g粗提物,在37.5小时内产生0.91 g的1和3.57 g的2,两种化合物的纯度均大于95通过ESI-MS,〜1H NMR和13C NMR鉴定化合物1和2的结构。

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