19788-56-8Relevant academic research and scientific papers
Synthesis of Imidazoles and Oxazoles via a Palladium-Catalyzed Decarboxylative Addition/Cyclization Reaction Sequence of Aromatic Carboxylic Acids with Functionalized Aliphatic Nitriles
Dai, Ling,Yu, Shuling,Lv, Ningning,Ye, Xuanzeng,Shao, Yinlin,Chen, Zhongyan,Chen, Jiuxi
supporting information, p. 5664 - 5668 (2021/08/01)
We herein report an efficient approach for the assembly of multiply substituted imidazoles and oxazoles in a single-step manner. These transformations are based on a decarboxylation addition and annulation of readily accessible aromatic carboxylic acids a
Palladium-catalyzed C-H activation of simple arenes and cascade reaction with nitriles: access to 2,4,5-trisubstituted oxazoles
Dai, Ling,Yu, Shuling,Shao, Yinlin,Li, Renhao,Chen, Zhongyan,Lv, Ningning,Chen, Jiuxi
supporting information, p. 1376 - 1379 (2021/02/22)
An efficient and straightforward protocol for the assembly of the pharmaceutically and biologically valuable oxazole skeleton is achieved for the first time from readily available simple arenes and functionalized aliphatic nitriles. This transformation in
Divergent Palladium-Catalyzed Tandem Reaction of Cyanomethyl Benzoates with Arylboronic Acids: Synthesis of Oxazoles and Isocoumarins
Chen, Jiuxi,Chen, Zhongyan,Dai, Ling,Shao, Yinlin,Xiong, Wenzhang,Xu, Tong,Yu, Shuling
supporting information, (2020/04/15)
A palladium-catalyzed tandem reaction of cyanomethyl benzoates with arylboronic acids has been achieved. Substitution at the 2-position of cyanomethyl benzoates was found to be crucial for the selective synthesis of oxazoles and isocoumarins. Cyanomethyl
Solvent-free synthesis of cyanohydrin derivatives catalysed by triethylamine
Baeza, Alejandro,Najera, Carmen,Retamosa, Ma. De Gracia,Sansano, Jose M.
, p. 2787 - 2797 (2007/10/03)
A very simple one-step environmentally friendly procedure for the synthesis of O-substituted cyanohydrins from aldehydes and ketones, in the absence of solvent, employing minimum amounts of the corresponding cyanides has been optimised. Aldehydes react more rapidly than ketones using triethylamine as catalyst offering in both cases almost quantitative yields of the corresponding O-trimethylsilyl, O-methoxycarbonyl, O-benzoyl and O-acetyl cyanohydrins. Georg Thieme Verlag Stuttgart.
A convenient and improved method for the preparation of cyanohydrin esters from acyl cyanides and aldehydes
Okimoto, Mitsuhiro,Chiba, Toshiro
, p. 1188 - 1190 (2007/10/03)
Various kinds of cyanohydrin esters can be obtained in good to excellent yields from aldehydes by treatment with acyl cyanides in a heterogeneous mixture of aqueous potassium carbonate and acetonitrile.
DABCO-Mediated Synthesis and Biological Activity of Cyanihydrin Esters
Hoffmann, H. M. R.,Ismail, Z. M.,Hollweg, Reiner,Zein, Abdul R.
, p. 1807 - 1810 (2007/10/02)
Cyanohydrin esters 1-31 have been prepared from α-ketonitriles and aldehydes using DABCO (1,4-diazabicyclooctane) as nucleophilic acylation catalyst.The modofied piperonal 8 was found to inhibit the formation of thromboxane synthetase.
Studies on Pyrazolopyrimidine Derivatives. XIII. Aryl Migration of 4-Aroyl-1H-pyrazolopyrimidines to 4-Aryl-4,5-dihydro-1H-pyrazolopyrimidine-4-carboxylic Acids
Higashino, Takeo,Matsushita, Yasuhiko,Takemoto, Masumi,Hayashi, Eisaku
, p. 3951 - 3958 (2007/10/02)
When a mixture of 4-aroyl-1-phenyl-1H-pyrazolopyrimidines (3) and sodium hydroxide in dimethyl sulfoxide (DMSO) was stirred for 1 h at room temperature, migration of the aryl group to the 4-position occurred, i.e., the benzilic acid rearrangement,
