Sulfinic acids and related compounds. 19. Synthesis and properties of 1-propane-, 1-butane-, and 1-pentanesulfinates terminally substituted with di- and trisulfide functions
虽然涉及 2e -转移途径的策略决定了糖基化的发展,但由于自由基异头选择性高以及原子和步骤经济性,易于获得的糖基供体作为自由基前体的直接糖基化特别有吸引力。然而,由于常用的不稳定糖基供体的竞争性还原、消除和/或 S N副反应,自由基过程的发展一直充满挑战。在这里,我们介绍了一种有机光催化策略,通过光氧化还原介导的 HAT 催化,糖基溴可以有效地转化为相应的异头自由基,无需过渡金属或导向基团,并实现高度异头选择性。温和的反应条件能够合成具有挑战性的α-1,2-顺式硫代糖苷、各种官能团的耐受性以及常见戊糖和己糖的广泛底物范围,证明了该平台的强大功能。此外,这种通用方法与 sp 2和 sp 3硫亲电子试剂以及总共探测的 50 种底物的后期糖基多样化兼容。
A new glutathione (GSH)-responsive traceless tag that facilitates intracellular delivery of small molecule chemical probes has been developed.
一种新的谷胱甘肽(GSH)响应型无痕标签已被开发出来,它可以促进小分子化学探针的细胞内递送。
Interactions of aromatic mannosyl disulfide derivatives with Concanavalin A: synthesis, thermodynamic and NMR spectroscopy studies
作者:Bandaru Narasimha Murthy、Sharmistha Sinha、Avadhesha Surolia、Narayanaswamy Jayaraman、László Szilágyi、Ildikó Szabó、Katalin E. Kövér
DOI:10.1016/j.carres.2009.06.008
日期:2009.9
alpha-D-Mannopyranosyl units were attached to an aromatic scaffold through disulfide linkages to obtain mono- to trivalent glycosylated ligands for lectinbindingstudies. Isothermaltitrationcalorimetric (ITC) measurements indicated that binding affinities of these derivatives to Concanavalin A (Con A) were comparable to or slightly higher than that of methyl alpha-D-mannopyranoside (K(a) values in the range of
The chemistry of alkyl thiosulfinate esters. 9. Antithrombotic organosulfur compounds from garlic: structural, mechanistic, and synthetic studies
作者:Eric. Block、Saleem. Ahmad、James L. Catalfamo、Mahendra K. Jain、Rafael. Apitz-Castro
DOI:10.1021/ja00282a033
日期:1986.10
Synthese de l'ajoene (oxyde-9 de trithia-4,5,9 dodecatriene-1,6,11) et de quelques analogues
合成 de l'ajoene (oxyde-9 de trithia-4,5,9 dodecatriene-1,6,11) et de quelques 类似物
Fluorescent labeling of s<sup>2</sup>T-incorporated DNA and m<sup>5</sup>s<sup>2</sup>U-modified RNA
作者:Ping Yu、Honglin Zhou、Yuanyuan Li、Zhifeng Du、Rui Wang
DOI:10.1080/15257770.2021.1942044
日期:2021.7.3
contrast, the alkylation process with S-benzyl methanethiosulfonate (BMTS, 2h) displays the best application potential only for s4U. Based on these results, the fluorescent labeling of s2T-incorporated DNA and m5s2U-modified RNA has been achieved. Supplemental data for this article is available online at https://doi.org/10.1080/15257770.2021.1942044 .
抽象的 我们在此报告了对含硫底物(包括核苷,如 s 2 U、m 5 s 2 U、s 4 U、s 2 A 和 s 2 T 掺入 DNA)的烷基化/硫交换反应的全面研究,通过全面筛选试剂 ( 2a–2h )。事实证明,碘乙酰胺 ( 2a ) 对含硫底物(包括 s 2 T、s 2 U、m 5 s 2 U、s 4 U 和 s 2 A)表现出最有前景的可行性。 S-苄基甲硫代磺酸盐(BMTS, 2h ) 仅对s 4 U 显示出最佳的应用潜力。基于这些结果,已经实现了s 2 T 掺入的DNA 和m 5 s 2 U 修饰的RNA 的荧光标记。 Supplemental data for this article is available online at https://doi.org/10.1080/15257770.2021.1942044 .
Reaction of thiolsulfinates with trihaloacetic anhydrides—I
Thiolsulfinates react with trifluoro- or trichloroacetic anhydride to give equimolar mixtures of the corresponding disulfides and sulfinyl trifluoro- or trichloroacetates which are in equilibria with sulfenyl carboxylates. Although the equilibrium lies far toward sulfinyl carboxylates at room temperature, addition of olefins to the mixed solution of sulfinyl carboxylate and a corresponding disulfide