Synthesis of Photoaffinity Probes for Heme-Containing Proteins
摘要:
Aryldiazenes with a second, photoactivatable, azide substituent on the aryl ring have been synthesized as active site probes for heme proteins of unknown active site structure. The probes include most of the possible isomers of the phenyl, naphthyl, and biphenyl ring systems. A selection of the probes has been shown to react with the model protein P450(cam) to give (arylazido)iron (FeArN3) complexes, a prerequisite for subsequent affinity labeling of the protein.
Aerobic Oxidation of Alkyl 2-Phenylhydrazinecarboxylates Catalyzed by CuCl and DMAP
作者:Min Hye Kim、Jinho Kim
DOI:10.1021/acs.joc.7b03119
日期:2018.2.2
various fruitful organic reactions such as a catalytic Mitsunobu reaction were reported by virtue of alkyl 2-phenylazocarboxylates, however, the synthesis of alkyl 2-phenylazocarboxylates largely depended on the stoichiometric use of toxic oxidants. In this manuscript, an environment-friendly aerobic oxidative transformation of alkyl 2-phenylhydrazinecarboxylates to alkyl 2-phenylazocarboxylates is
Oxidation Potential Tunable Organic Molecules and Their Catalytic Application to Aerobic Dehydrogenation of Tetrahydroquinolines
作者:Dahyeon Jung、Seol Heui Jang、Taeeun Yim、Jinho Kim
DOI:10.1021/acs.orglett.8b02749
日期:2018.10.19
In this work, oxidation potential tunable organic molecules, alkyl 2-phenyl hydrazocarboxylates, were disclosed. The exquisite tuning of their oxidation potentials facilitated a catalyticdehydrogenation of 1,2,3,4-tetrahydroquinolines in the presence of Mn(Pc) and O2.
A highly efficient, metal-free, chemical oxidation of hydrazines has been implemented using environmentally friendly TCCA as oxidant. This benign protocol provides straightforward access to a wide range of azo compounds in THF in excellent yield. Altogether, 35 azo compounds were obtained in this way and scale-up preparations were performed. Additionally, a plausible mechanism was also proposed. Step-economical
A convenient method for the synthesis of 2-arylazocarboxylates from 2-arylhydrazinecarboxylates by aerobicoxidation with ironphthalocyanine is described. The reaction is applicable to oxidative activation of 1-acyl-2-phenylhydrazines. Some preliminary experiments suggest Michaelis–Menten kinetics and participation of radical species in the reaction mechanism.
An Efficient Synthesis of New 2-Aryl-5-phenylazenyl-1,3,4-oxadiazole Derivatives from N,N'-Diarylcarbonohydrazides
作者:Agnieszka Kudelko、Anna Kędzia、Karolina Jasiak
DOI:10.1055/s-0037-1610105
日期:2018.8
A series of new 1,3,4-oxadiazoles conjugated to aromatic substituents by an azo linker was synthesized in a four-step reaction sequence, involving cyclodehydration of a N,N'-diacylhydrazine fragment and dehydrogenation of the neighboring hydrazine fragment of the intermediate N,N'-diarylcarbonohydrazide.