描述了从黄杆菌粘球菌分离的新型抗真菌物质粘噻唑1的全合成。该合成基于SE,E-二烯硫酰胺1 5和作为主要中间体的2 R S,3 S R酰胺醛2 5的精细制备,然后将1 5转化为双-噻唑1 9和最终的Wittig偶联反应之间2 5和盐2 0℃,导致7小号,18 S R,19 - [R小号myxothiazol。
描述了从黄杆菌粘球菌分离的新型抗真菌物质粘噻唑1的全合成。该合成基于SE,E-二烯硫酰胺1 5和作为主要中间体的2 R S,3 S R酰胺醛2 5的精细制备,然后将1 5转化为双-噻唑1 9和最终的Wittig偶联反应之间2 5和盐2 0℃,导致7小号,18 S R,19 - [R小号myxothiazol。
Total synthesis of myxothiazols, novel bis-thiazole β-methoxyacrylate-based anti-fungal compounds from myxobacteria
作者:John M. Clough、Henry Dube、Bruce J. Martin、Gerald Pattenden、K. Srinivasa Reddy、Ian R. Waldron
DOI:10.1039/b603433k
日期:——
Convergent total syntheses of myxothiazols A and Z are described. The syntheses are based on elaboration of the (S)-E,E-diene thioamide 22, conversion of 22 into the bis-thiazole 27 and Wittig reactions between 27c and the aldehyde 30. The substituted beta-methoxyacrylate aldehyde 30 was produced via an Evans asymmetric aldol protocol or via the 2H-pyran-2-one 31. An E-selective Wittig reaction between
The first synthesis of (+)-myxothiazol A 1 was achieved based on a modified Julia olefination between (3,5R)-dimethoxy-(4R)-methyl-6-oxo-(2E)-hexenamide 3, corresponding to the left side of the final molecule, and 4-(2 ''-benzothiazolyl)sulfonylmethyl-2'-[(1'''R),6"'-dimethylhepta-(2"'E),(4"'E)-dienyl]-2,4'-bithiazole 6, corresponding to the right side. The synthesis of (+)-myxothiazol Z 2 was also achieved based on modified Julia olefination between (3,5R)-dimethoxy-(4R)-methyl-6-oxo-(2E)-hexenoate 4, corresponding to left side of the final molecule, and (S)-sulfone 6. (C) 2009 Elsevier Ltd. All rights reserved.
First synthesis of (+)-myxothiazol A
作者:Yuki Iwaki、Masahiro Kaneko、Hiroyuki Akita
DOI:10.1016/j.tetlet.2008.09.125
日期:2008.12
First convergent synthesis of (+)-myxothiazol A(1) was achieved based on modified (one-pot) Julia Olefination between (3,5R)-dimethoxy-(4R)-methyl 6-oxo-(2E)-hexenamide (2), corresponding to left-side of the final molecule, and E-4-2'-(1S,6-dimethylheptadiene)-(2,4'-bis-thiazole)-4-methybenzothiazole sulfone (4) corresponding to right-side. (C) 2008 Elsevier Ltd. All rights reserved.