432545-85-2Relevant academic research and scientific papers
Asymmetric Stepwise Reductive Amination of Sulfonamides, Sulfamates, and a Phosphinamide by Nickel Catalysis
Zhao, Xiaohu,Xu, Haiyan,Huang, Xiaolei,Zhou, Jianrong Steve
supporting information, p. 292 - 296 (2018/12/13)
Asymmetric reductive amination of poorly nucleophilic sulfonamides was realized in the presence of nickel catalysts and titanium alkoxide. A wide range of ketones, including enolizable ketones and some biaryl ones, were converted into sulfonamides in excellent enantiomeric excess. The cyclization of sulfamates and intermolecular reductive amination of a diarylphosphinamide were also successful. Formic acid was used as a safe and economic surrogate of high-pressure hydrogen gas.
Carbene-catalyzed LUMO activation of alkyne esters for access to functional pyridines
Mou, Chengli,Wu, Jichang,Huang, Zhijian,Sun, Jun,Jin, Zhichao,Chi, Yonggui Robin
supporting information, p. 13359 - 13362 (2017/12/26)
A carbene-catalyzed LUMO activation of α,β-unsaturated alkyne esters is reported. This catalytic process allows for effective reactions of alkyne esters with enamides to synthesize functional pyridines via simple protocols. A previously unexplored unsaturated alkyne acyl azolium intermediate is involved in the key step of the reaction.
Direct Synthesis of Enolizable N-Sulfonyl Ketimines under Microwave Irradiation
Ortiz, Pablo,Collados, Juan F.,Harutyunyan, Syuzanna R.
supporting information, p. 1247 - 1250 (2016/03/19)
N-sulfonyl imines are widely used as substrates for a range of transformations. Access to N-sulfonyl aldimines is straightforward through direct condensation between the parent aldehyde and the sulfonamide. However, this approach is not efficient for the
Asymmetric Strecker reaction of ketoimines catalyzed by a novel chiral bifunctional N,N′-dioxide
Huang, Xiao,Huang, Jinglun,Wen, Yuehong,Feng, Xiaoming
, p. 2579 - 2584 (2007/10/03)
A novel bifunctional N,N′-dioxide derived from L-prolinamide was employed to catalyze the enantioselective Strecker reaction of a range of N-tosyl ketoimines, and an effective additive was used to improve the reactivity (up to 99% yield) as well as the en
Aza-pinacol rearrangement: Acid-catalyzed rearrangement of aziridines to imines
Sugihara, Yoshiaki,Iimura, Shinya,Nakayama, Juzo
, p. 134 - 135 (2007/10/03)
A series of di-, tri-, and tetra-substituted N-tosylaziridines [N-(toluene-p-sulfonyl)aziridines] 1, prepared by aziridination of the corresponding alkenes with N-[(tolyl-p-sulfonyl)-imino]phenyliodinane (TsN = IPh), was found to undergo a BF3-catalyzed rearrangement (aza-pinacol rearrangement) under mild conditions to give the corresponding N-tosylimines 2 generally in satisfactory yields.
