compared with the corresponding properties of 1, 2, vertinolide (4), 3-methoxy-2-methyl-2-cyclohexenone (14), and 2-[(E,E)-2,4-hexadienoyl)]-cyclohexanone (13). The latter was prepared by acylation of the lithium enolate of cyclohexanone with sorbyl chloride. From the spectra of the hexaketides from V. intertextum several patterns have been extracted which are characteristic for some common and some distinguishing
从黄萎病菌的
培养基中分离出三个代谢产物,即六酮
山梨醇(1)和2'3'-二氢
山梨醇(2),和二聚六酮双
酚维他命(3)。1先前已从产黄青霉中分离并合成。1的氢化产生四氢山西林(8),2'5'-二氢山西林(9)和2',3'-二氢山西林(2)。2也通过BF 3催化的2,4-二甲基
间苯二酚(5)与(4R *,5S *)-4,5-二
溴己酸(6),然后用
锌和
乙酸脱
溴。通过X射线结构分析获得二聚六酮化合物3的结构(无绝对构型)。可以认为是喹诺醇11和12的Diels-Alder加合物,后者通过在C(5)处的简单羟基化分别与1和2有关。的1 H和13个的C NMR信号3和其单
甲醚10解释并与相应的属性相比较1,2,vertinolide(4),3-甲氧基-2-甲基-2-
环己烯酮(14)和2-[((E,E)-2,4-己二酰基)]-
环己酮(13)。后者通过用山梨酰
氯酰化
环己酮的烯醇
锂来制备。从V的六酮化合物的光