218449-48-0Relevant articles and documents
Base-induced Sommelet–Hauser rearrangement of N-(α-(2-oxyethyl)branched)benzylic glycine ester-derived ammonium salts via a chelated intermediate
Baba, Souya,Hirano, Kazuki,Tayama, Eiji
, (2020/03/13)
The base-induced Sommelet–Hauser (S–H) rearrangement of N-(α-branched)benzylic glycine ester-derived ammonium salts 1 was investigated. When the α-branched substituent was a simple alkyl, such as a methyl or butyl, desired S–H rearrangement product 2 was obtained in low yield with formation of the [1,2] Stevens rearranged 4 and Hofmann eliminated products 5 and 6. However, when the α-branched substituent had a 2-oxy moiety, such as 2-acetoxyethyl or 2-benzoyloxyethyl, the yields of 2 were improved. These results could be explained by formation of chelated intermediate C that stabilizes the carbanionic ylide, and the subsequent initial dearomative [2,3] sigmatropic rearrangement would be accelerated. The existence of C was supported by mechanistic experiments. This enhancement effect is not very strong or effective; however, it will expand the synthetic usefulness of ammonium ylide rearrangements.
Enzyme-catalyzed cascade synthesis of hydroxyiminoacetamides
Kne?evi?, Anamarija,Vinkovi?, Vladimir,Marakovi?, Nikola,?inko, Goran
, p. 4338 - 4341 (2014/07/22)
In order to synthesize N-(3-azido-1-phenylpropyl)-2-hydroxyiminoacetamide, a key compound for the preparation of acetylcholinesterase (AChE) reactivators of the N-substituted 2-hydroxyiminoacetamide type, it was necessary to develop a method for forming a
Structure-activity relationships of 1,3,5-triazine-2,4,6-triones as human gonadotropin-releasing hormone receptor antagonists
Guo, Zhiqiang,Wu, Dongpei,Zhu, Yun-Fei,Tucci, Fabio C.,Regan, Collin F.,Rowbottom, Martin W.,Struthers, R. Scott,Xie, Qiu,Reijmers, Shelby,Sullivan, Susan K.,Sai, Yang,Chen, Chen
, p. 3685 - 3690 (2007/10/03)
SAR studies of 1,3,5-triazine-2,4,6-triones as human gonadotropin-releasing hormone receptor antagonists resulted in potent compounds. The best compound from the series had a binding affinity of 2 nM.