Photoenzymatic Hydrogenation of Heteroaromatic Olefins Using ‘Ene’‐Reductases with Photoredox Catalysts
作者:Yuji Nakano、Michael J. Black、Andrew J. Meichan、Braddock A. Sandoval、Megan M. Chung、Kyle F. Biegasiewicz、Tianyu Zhu、Todd K. Hyster
DOI:10.1002/anie.202003125
日期:2020.6.22
selective catalysts for the asymmetric reduction of activated alkenes. This function is, however, limited to enones, enoates, and nitroalkenes using the native hydride transfer mechanism. Here we demonstrate that EREDs can reduce vinyl pyridines when irradiated with visible light in the presence of a photoredoxcatalyst. Experimental evidence suggests the reaction proceeds via a radical mechanism where
Tertiary α-diarylmethylamines derived from diarylketimines and organomagnesium reagents
作者:Alaric Desmarchelier、Pablo Ortiz、Syuzanna R. Harutyunyan
DOI:10.1039/c4cc06719c
日期:——
Organomagnesium reagents enable swift and versatile derivatisation of diarylimines to the corresponding α-substituted diarylmethylamines in excellent yields, through fast and clean reactions.
有机镁试剂使二芳基亚胺能够迅速、多样地衍生为相应的α-取代二芳基甲胺,收率极高,反应快速干净。
A convenient synthesis of 2-acyl benzothiazoles/thiazoles from benzothiazole/thiazole and N,N'-carbonyldiimidazole activated carboxylic acids
A convenient and efficient strategy for the synthesis of 2-acyl benzothiazoles/thiazoles has been developed. The treatment of benzothiazole/thiazole with allylic Grignard reagents readily generates the corresponding 2-Grignard reagents, which is followed by a reaction with N,N'-carbonyldiimidazole activated carboxylic acids to afford various 2-acyl benzothiazoles/thiazoles products. The synthetic method
with C–N bond formation, providing an efficient and environmentally safe approach to a variety of synthetically useful cyanoalkyl-containing β-enamino ketones with outstanding selectivity and commendable functional group compatibility. Moreover, the application of microflow technique enhanced these reactions compared with the equivalent batch reaction, significantly reducing the reaction times to 5–9
Cyclic quaternary ammonium salts. Part VI. Synthesis of thiazolo-[3,2-a]pyrazin-5-ium salts
作者:J. Adamson、E. C. Campbell、E. E. Glover
DOI:10.1039/j39690002270
日期:——
The synthesis of the 2-oxides of thiazolo[3,2-a]pyrazinum salts (IV) and their deoxygenation to the title compounds (V) is described. An alternative route to the title compounds by intramolecular cyclisation of the anils formed between 2-acylthiazoles and aminoacetaldehyde dimethylacetal is also described.
描述了噻唑并[3,2- a ]吡嗪鎓盐(IV)的2-氧化物的合成及其脱氧为标题化合物(V)。还描述了通过分子内环化2-酰基噻唑和氨基乙醛二甲基乙缩醛之间形成的苯胺制得标题化合物的另一种途径。