Determination of Absolute Configuration and Biological Activity of New Immunosuppressants, Mycestericins D, E, F and G.
摘要:
Mycestericins D、E、F 和 G 是从 Mycelia sterilia ATCC 20349 的培养液中分离出的强效免疫抑制剂。Mycestericins F 和 G 分别与二氢美克斯特里辛 D 和 E 相同。通过使用修饰的 MOSHER 方法和比较它们的苯甲酸酯衍生物的圆二色光谱与合成类似物的光谱,确定了它们的绝对构型。Mycestericins D、E、F 和 G 抑制了小鼠同种异体混合淋巴细胞反应中淋巴细胞的增殖。
requisite functionalities of the polar heads of sphingosines with the appropriate stereochemical arrangement. The rapid asymmetric assembly of these functional groups allowed a concise enantioselective synthetic route to sphingosines to be established with a broad flexibility towards derivative synthesis. These studies have culminated in an efficient catalytic enantioselective totalsynthesis of immunosuppressive
Mycestericins D, E, F and G were isolated from the culture broth of Mycelia sterilia ATCC 20349 as potent immunosuppressants. Mycestericins F and G were identical with dihydromycestericins D and E, respectively. Their absolute configurations were determined by use of the modified MOSHER'S method and by comparison of the CD spectra of their benzoate derivatives with those of synthetic analogs. Mycestericins D, E, F and G suppressed the proliferation of lymphocytes in the mouse allogeneic mixed lymphocyte reaction.
Mycestericins D、E、F 和 G 是从 Mycelia sterilia ATCC 20349 的培养液中分离出的强效免疫抑制剂。Mycestericins F 和 G 分别与二氢美克斯特里辛 D 和 E 相同。通过使用修饰的 MOSHER 方法和比较它们的苯甲酸酯衍生物的圆二色光谱与合成类似物的光谱,确定了它们的绝对构型。Mycestericins D、E、F 和 G 抑制了小鼠同种异体混合淋巴细胞反应中淋巴细胞的增殖。