N‐alkyl hydroxylamines are effective reagents for the amination of organoboronic acids in the presence of trichloroacetonitrile. This amination reaction proceeds rapidly at roomtemperature and in the absence of added metal or base, it tolerates a remarkable range of functional groups, and it can be used in the late‐stage assembly of two complex units.
Brønsted acid-catalyzed metal- and solvent-free quinoline synthesis from<i>N</i>-alkyl anilines and alkynes or alkenes
作者:Waqar Ahmed、Sheng Zhang、Xiaoqiang Yu、Yoshinori Yamamoto、Ming Bao
DOI:10.1039/c7gc03175k
日期:——
Brønstedacid-catalyzed cyclization reactions of N-alkyl anilines with alkynes or alkenes in the presence of oxygen gas as an oxidant under metal- and solvent-free conditions are described. Various quinoline derivatives are obtained in satisfactory to excellent yields. Different groups, such as methyl, fluoro, chloro, bromo, methoxy, and ester linked on benzene rings, are tolerated under optimized
Fast and Efficient Reductive Amination of Aldehydes by NaBH<sub>4</sub>/B(OH)<sub>3</sub>and NaBH<sub>4</sub>/Al(OH)<sub>3</sub>
作者:Davood Setamdideh、Samira Hasani、Shahla Noori
DOI:10.1002/jccs.201300138
日期:2013.7.11
Reductiveamination a variety of aldehydes and anilines to their corresponding secondary amines were carried out with NaBH4/B(OH)3 and NaBH4/Al(OH)3 as new reducingsystems in CH3CN at room temperature in high to excellent yields of products (90‐96%).
also report an interesting direductive amination of 2-ethylbutanal. A direct reductive amination of aldehydes with anilines is performed with a ruthenium(II)-(arene) catalyst. The [RuCl2(p-cymene)]2/Ph2SiH2 catalytic system is very efficient for the synthesis of secondary amines and tertiary amines in good yields, and is highly chemoselective, tolerating a wide range of functional groups, such as NO2
NHC-carbene cyclopentadienyl iron based catalyst for a general and efficient hydrosilylation of imines
作者:Luis C. Misal Castro、Jean-Baptiste Sortais、Christophe Darcel
DOI:10.1039/c1cc14403k
日期:——
A general and efficient hydrosilylation of imines catalysed by a well defined NHC-carbene cyclopentadienyl iron complex has been developed. Both aldimines and ketimines are converted to the corresponding amines under mild conditions, and under visible light activation.