AbstractA general protocol for the selective mono-O-methylation of resorcinyl phytocannabinoids was developed. The availability of semisynthetic monomethyl analogues of cannabigerol, cannabidiol, and cannabidivarin (1a–3a, respectively) made it possible to quantify these minor phytocannabinoids in about 40 different chemotypes of fiber hemp. No chemotype significantly accumulated mono-O-methyl cannabidiol (2b) or its lower homologue (3b), while at least three chemotypes containing consistent amounts (≥ 400 mg/kg) of O-methylcannabigerol (1b) were identified. O-Methylation of alkyl phytocannabinoids (1b–3b) does not significantly change the activity on peroxisome proliferator-activated receptors in contrast to what was reported for phenethyl analogues.
摘要:开发了一种选择性单O-甲基化邻苯二酚类植物大麻素的通用协议。半合成的大麻酚酸、大麻二酚和大麻二酚酯(分别为1a-3a)的可用性使得能够在大约40种不同类型的纤维大麻中定量这些次要的植物大麻素。没有任何类型明显积累单O-甲基大麻二酚(2b)或其较低的同系物(3b),而至少有三种类型含有一致数量(≥400mg/kg)的O-甲基大麻酚酸(1b)。与已报道的苯乙基类似物相反,烷基植物大麻素(1b-3b)的O-甲基化不会显著改变对过氧化物酶体增殖物活化受体的活性。