我们报告了一种使用安德森型多氧钼酸铁 ( III ) 作为催化剂和过氧化氢作为氧化剂在乙醇水溶液中氧化脱氢肼和二芳基胺的有效方法。以中等至极好的收率获得了一系列偶氮化合物和四芳基肼。反应条件和底物范围补充或优于更成熟的方案。此外,该催化剂在水中表现出良好的稳定性和重复使用性。初步的机理研究表明,该反应涉及一个自由基过程。
[EN] CHEMOSELECTIVE THIOL-CONJUGATION WITH ALKENE OR ALKYNE-PHOSPHONAMIDATES<br/>[FR] CONJUGAISON CHIMIOSÉLECTIVE D'UN THIOL AVEC DES ALCÈNE- OU ALCYNE-PHOSPHONAMIDATES
申请人:FORSCHUNGSVERBUND BERLIN EV
公开号:WO2018041985A1
公开(公告)日:2018-03-08
Disclosed are novel conjugates and processes for the preparation thereof. A process for the preparation of alkene- or alkyne-phosphonamidates comprises the steps of (I) reacting a compound of formula (III), with an azide of formula (IV), to prepare a compound of formula (V), reacting a compound of formula (V) with a thiol-containing molecule of formula (VI), resulting in a compound of formula (VII).
Rh(III)-catalyzed [4 + 1]-annulation of azobenzenes with α- carbonyl sulfoxonium ylides toward 3-acyl-(2H)-indazoles
作者:Jiawei Zhu、Song Sun、Jiang Cheng
DOI:10.1016/j.tetlet.2018.05.001
日期:2018.6
A Rh(III)-catalyzed [4 + 1]-annulation of azobenzenes with α- carbonylsulfoxoniumylides was developed to access 2H-indazoles in moderate to excellent yields with good functional group compatibilities. It proceeded with the sequential insertion of the Rh(III) carbene to the C−H bond and cyclization steps, where sulfoxoniumylides served as efficient and stable carbene precursor.
efficient method for synthesis of both symmetric and asymmetric aromaticazocompounds in one single step has been developed. The nitrocompounds were reduced and the substituted anilines were oxidized by each other without any metal in the base condition. Various azocompounds with halogen, methyl and methoxy functional group were obtained by using available, cheap nitrocompounds and substituted anilines
Selective Rhodium-Catalyzed C–H Amidation of Azobenzenes with Dioxazolones under Mild Conditions
作者:Bomi Jeon、Uiseong Yeon、Jeong-Yu Son、Phil Ho Lee
DOI:10.1021/acs.orglett.6b02250
日期:2016.9.16
A synthetic method for a wide range of amidated azobenzenes is developed from the selective rhodium-catalyzed C–H amidation reaction of symmetrical as well as unsymmetrical azobenzenes with alkyl-, aryl-, and heteroaryl-substituted dioxazolones undermildconditions. Diamidation of azobenzenes and amidation of monoamidated azobenzenes were also demonstrated.
The present teaching provides a fluorescent oligonucleotide probe having a high degree of design flexibility and wide applicability, as well as the use thereof. This is an oligonucleotide probe capable of forming a stem and loop, comprising at least one fluorophore located between adjacent nucleotides in the stem and is linked to a unit represented by Formula (1) and at least one quencher located at a site capable of pairing up with the at least one fluorophore located between the adjacent nucleotides in the stem and is linked to a unit represented by Formula (2). (In the formulae, X represents the fluorophore, Y represents the quencher, R1 represents an optionally substituted C
2
or C
3
alkylene chain, R2 represents an optionally substituted C
0-2
alkylene chain, and Z represents a direct bond or linker.)