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。
DOI:
10.7164/antibiotics.49.846
作为产物:
描述:
Mycestericin E 在
palladium on activated charcoal 氢气 作用下,
以
甲醇 为溶剂,
以96%的产率得到mycestericin G
参考文献:
名称:
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。
Remote Stereocontrol in [3,3]-Sigmatropic Rearrangements: Application to the Total Synthesis of the Immunosuppressant Mycestericin G
作者:Nathan W. G. Fairhurst、Mary F. Mahon、Rachel H. Munday、David R. Carbery
DOI:10.1021/ol203300k
日期:2012.2.3
3]-sigmatropic rearrangement has been used to access biologically important β,β′-dihydroxy α-amino acids. The rearrangement reported is highly stereoselective and offers excellent levels of remotestereocontrol. This strategy has been used to synthesize the natural immunosuppressant mycestericin G and ent-mycestericin G, allowing for a revision of absolute configuration of this natural product.
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
Disclosed are compounds of the general formula I and II (as further defined herein) are useful in the production of inhibitors of sphingolipid synthesis the production of sphingolipids. Suitable sphingolipids, include, but not limited to, sphingosine and compounds incorporating sphingosine or that may use sphingosine as an intermediate or a starting material in their synthesis (including, but not limited to, sphingosine-1-P, ceramide, gangliosides and sphigomyelin). In one contemplated use, compounds of the general formula I and II are useful in the production of sphingosine. In another contemplated use, compounds of the general formula I and II are useful in the production of a sphingofugin. Methods of manufacturing each of the above compounds are also provided.