Indonesian Medicinal Plants. VI. On the Chemical Constituents of the Bark of Picrasma javanica BL. (Simaroubaceae) from Flores Island. Absolute Stereostructures of Picrajavanins A and B.
picrajavanin A 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 1.5h,
以16 mg的产率得到desbenzoyl-picrajavanin A
参考文献:
名称:
Indonesian Medicinal Plants. VI. On the Chemical Constituents of the Bark of Picrasma javanica BL. (Simaroubaceae) from Flores Island. Absolute Stereostructures of Picrajavanins A and B.
Indonesian Medicinal Plants. VI. On the Chemical Constituents of the Bark of Picrasma javanica BL. (Simaroubaceae) from Flores Island. Absolute Stereostructures of Picrajavanins A and B.
Two new quassinoids named picrajavanins A and B were isolated, together with known β-carboline alkaloids and picrasidine G, from the bark of Picrasma Javanica BL. (Simaroubaceae), an Indonesian folk medicine, collected on Flores Island. The absolute stereostructures of picrajavanins A (6) and B (7) have been elucidated on the basis of chemical and physicochemical evidence, together with the application of the modified Mosher's method.