180747-36-8Relevant academic research and scientific papers
Highly stereoselective intramolecular Buchner reaction of diazoacetamides catalyzed by a Ru(ii)-Pheox complex
Phan Thi Thanh, Nga,Tone, Masaya,Inoue, Hayato,Fujisawa, Ikuhide,Iwasa, Seiji
, p. 13398 - 13401 (2019)
This work reports the first efficient enantioselective intramolecular Buchner reaction of diazoacetamides. The Ru(ii)-Pheox catalyst was shown to be highly efficient in this transformation in terms of both the regio-and enantioselectivity (up to 99% ee) giving the desired products in quantitative yield.
Catalytic Enantioselective Intramolecular C(sp3)?H Amination of 2-Azidoacetamides
Zhou, Zijun,Chen, Shuming,Qin, Jie,Nie, Xin,Zheng, Xingwen,Harms, Klaus,Riedel, Radostan,Houk,Meggers, Eric
supporting information, p. 1088 - 1093 (2019/01/04)
An enantioselective ring-closing C(sp3)?H amination of 2-azidoacetamides is catalyzed by a chiral-at-metal ruthenium complex and provides chiral imidazolidin-4-ones in 31–95 % yield, with enantioselectivities of up to 95 % ee, and at catalyst loadings down to 0.1 mol % (turnover number (TON)=740). To our knowledge, this is the first example of a highly enantioselective C(sp3)?H amination with aliphatic azides. Mechanistic experiments reveal the importance of the amide group, which presumably enables initial bidentate coordination of the 2-azidoacetamides to the catalyst. DFT calculations show that the transition state leading to the major enantiomer features a better steric fit and favorable π–π stacking between the substrate and the catalyst framework.
Samarium(II) iodide mediated intermolecular coupling reactions of N,N-dibenzyl-α-haloamides with carbonyl compounds
Aoyagi, Yutaka,Asakura, Rie,Kondoh, Nobuko,Yamamoto, Rieko,Kuromatsu, Takeshi,Shimura, Ai,Ohta, Akihiro
, p. 970 - 974 (2007/10/03)
Samarium(II) iodide mediated coupling reactions of α-haloamides with carbonyl compounds are found to give N,N-dibenzyl-β-hydroxyamides (4a-i, 5a-i, and 6a) in good yields under mild reaction conditions. The transformation of 4a and 5a to N,N-dibenzyl-3-phenylpropanamide (7) and β-hydroxycarboxylic acid (8), respectively, are described.
