TEMPO-Mediated Aliphatic C–H Oxidation with Oximes and Hydrazones
摘要:
A method for aliphatic C-H bond oxidation of oximes and hydrazones mediated by 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) has been developed, which enables the concise assembly of substituted isoxazole and pyrazole skeletons.
在这里,我们报道了一种新的一锅法,用于从羧酸开始的SO 2 F 2介导的亲核酰基取代反应。机理研究表明,SO 2 F 2介导的酸活化是通过酸酐进行的,然后将其转化为相应的酰基氟。四丁基氯化铵或溴化物可加速酰基氟的形成。优化的卤化物加速条件可用于以30-80%的产率合成酰氟,而酯,酰胺和硫代酯的产率为72-96%,而无需对每个亲核试剂进行重新优化。
This invention relates to novel 1-hydroxyimino-3-phenyl-propanes of the formula (I) wherein R1 to R10 are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof. These compounds are GPBAR1 agonists and may be used as medicaments for the treatment of diseases such as type II diabetes.
Weinreb Amide, Ketone and Amine as Potential and Competitive Secondary Molecular Stations for Dibenzo‐[24]Crown‐8 in [2]Rotaxane Molecular Shuttles
作者:Maxime Gauthier、Frédéric Coutrot
DOI:10.1002/chem.202103805
日期:2021.12.15
New DB24C8-based [2]rotaxanemolecularshuttles that contain ammonium, amine, Weinreb amide and/or ketone stations have been synthesized and characterized. Their shuttling behavior, which is linked to the ability of the considered moieties to act as efficient secondary molecular stations of more or less high affinity for the macrocycle, depended on the combination of stations and steric restrictions
Thionyl Fluoride-Mediated One-Pot Substitutions and Reductions of Carboxylic Acids
作者:Trevor G. Bolduc、Cayo Lee、William P. Chappell、Glenn M. Sammis
DOI:10.1021/acs.joc.2c00496
日期:2022.6.3
one-pot peptide couplings, but the full scope of these nucleophilic acyl substitutions had not been explored. Herein, we report one-pot thionyl fluoride-mediated syntheses of peptides and amides (35 examples, 45–99% yields) that were not explored in our previous study. The scope of thionyl fluoride-mediated nucleophilic acyl substitutions was also expanded to encompass esters (24 examples, 64–99% yields)
This invention relates to novel 1-hydroxyimino-3-phenyl-propanes of the formula
wherein R
1
to R
10
are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof. These compounds are GPBAR1 agonists and may be used as medicaments for the treatment of diseases such as type II diabetes.
This invention relates to novel 1-hydroxyimino-3-phenyl-propanes of the formula
wherein R1 to R10 are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof. These compounds are GPBAR1 agonists and may be used as medicaments for the treatment of diseases such as type II diabetes.