Avellanins A and B (1 and 2), new pressor-active fungal metabolites from Hamigera avellanea, have been conveniently synthesized from methyl anthranilate. This synthetic study has established the absolute stereostructure of avellanin B (2). Coupling of methyl anthranilate with N-protected amino acid derivatives was best carried out by use of ((9-fluorenylmethyl)oxy)carbonyl (Fmoc)-amino acid chloride. Chain elongation for avellanins was accomplished with diethyl phosphorocyanidate, while cyclization was achieved with diphenyl phosphorazidate.
Avellanins A 和 B(1 和 2)是来自哈米热拉·阿维拉尼亚(Hamigera avellanea)的新型升压活性真菌代谢产物,已方便地从甲基氨基苯甲酸酯合成。该合成研究确定了avellanin B(2)的绝对立体结构。甲基氨基苯甲酸酯与N保护氨基酸衍生物的耦合最佳使用((9-芴基甲基)氧)碳酸基(Fmoc)-氨基酸氯化物进行。Avellanin的链延伸采用二乙基膦酸腈酸酯完成,而环化则通过二苯基膦酸叠氮酸酯实现。