METHOD FOR PRODUCING HAIRPIN SINGLE-STRAND RNA MOLECULES
申请人:Toray Industries, Inc.
公开号:EP3862431A1
公开(公告)日:2021-08-11
The present invention relates to a method for producing a hairpin single-stranded RNA molecule capable of inhibiting expression of a target gene, comprising the step of reacting a first single-stranded oligo-RNA molecule represented by the following formula (I) with a second single-stranded oligo-RNA molecule represented by the following formula (II) in a mixed solvent comprising a buffer solution and a hydrophilic organic solvent in the presence of a dehydration condensation agent: 5'-Xc-Lx1 ... (I) and Lx2-X-Y-Ly-Yc-3' ... (II), wherein the dehydration condensation agent is selected from the group consisting of a triazine-based dehydration condensation agent, a uronium-based dehydration condensation agent comprising an N-hydroxy nitrogen-containing aromatic ring structure, a carbodiimide-based dehydration condensation agent, a 2-halopyridinium-based dehydration condensation agent, and a formamidinium-based dehydration condensation agent.
本发明涉及一种生产能够抑制靶基因表达的发夹型单链 RNA 分子的方法,包括以下步骤: 在由缓冲溶液和亲水性有机溶剂组成的混合溶剂中,在脱水缩合剂存在的情况下,由下式 (I) 表示的第一单链寡核苷酸分子与由下式 (II) 表示的第二单链寡核苷酸分子反应: 5'-Xc-Lx1 ...... (I) 和 Lx2-X-Y-Ly-Yc-3' ...... (II) ,其中脱水缩合剂选自由三嗪类脱水缩合剂、脲类脱水缩合剂、脲类脱水缩合剂和脲类脱水缩合剂组成的组。...(I)和 Lx2-X-Y-Ly-Yc-3' ...(II),其中脱水缩合剂选自由三嗪基脱水缩合剂、包含 N-羟基含氮芳香环结构的脲基脱水缩合剂、碳二亚胺基脱水缩合剂、2-卤代吡啶鎓基脱水缩合剂和甲脒基脱水缩合剂组成的组。
METHOD OF PRODUCING HAIRPIN SINGLE-STRANDED RNA MOLECULES
申请人:Toray Industries, Inc.
公开号:US20210317495A1
公开(公告)日:2021-10-14
A method produces a hairpin single-stranded RNA molecule capable of inhibiting expression of a target gene, including the step of reacting a first single-stranded oligo-RNA molecule represented by formula (I) with a second single-stranded oligo-RNA molecule represented by formula (II) in a mixed solvent including a buffer solution and a hydrophilic organic solvent in the presence of a dehydration condensation agent: 5′-Xc-Lx
1
(I) and Lx
2
-X—Y-Ly-Yc-3′ (II), wherein the dehydration condensation agent is selected from the group consisting of a triazine-based dehydration condensation agent, a uronium-based dehydration condensation agent including an N-hydroxy nitrogen-containing aromatic ring structure, a carbodiimide-based dehydration condensation agent, a 2-halopyridinium-based dehydration condensation agent, and a formamidinium-based dehydration condensation agent.
Syntheses of bifunctional 2,3-diamino propionic acid-based chelators as small and strong tripod ligands for the labelling of biomolecules with 99mTc
作者:Yu Liu、Bruno L. Oliveira、João D. G. Correia、Isabel C. Santos、Isabel Santos、Bernhard Spingler、Roger Alberto
DOI:10.1039/c002796k
日期:——
The labelling of targeting biomolecules requires small and hydrophilic complexes in order to not affect the binding properties of the vectors. 2,3-Diamino propionic acid (dap) is a small and strong, albeit scarcely used, tripod ligand for the fac-[99mTc(CO)3]+ moiety. We have introduced at the α-carbon atom in the basic dap structure various second functionalities such as carboxylato, amino and α-amino acid groups via various spacers in order to yield bifunctional chelators. These dap derivatives can be coupled to targeting molecules for application in molecular imaging. Full characterizations of the bifunctional chelators, X-ray structures of intermediates and of one rhenium complex, as well as labelling studies with 99mTc, are presented.
Heteroatomic chains and their products of cyclisation. IV.<i>t</i>-butyl-2-phthalimido-2-(3,6-dihydro-1,3-2<i>H</i>-thiazine-2-yliden)-acetates substituted in position 5 by a functional group
Substituted N′-thioacetylformamidines, readily enthiolized, exist in fact in the form of zwitterions 8 with the transfer of the mobile hydrogen on the nitrogen N′. These zwitterions under (4 + 2) cyclocondensation with dienophiles. The dihydrothiazines formed (10) are possible interesting intermediates in the synthesis of cephems and cephalosporin analogs.