S-Benzyl isothiouronium chloride as a recoverable organocatalyst for the direct reductive amination of aldehydes
作者:Quynh Pham Bao Nguyen、Taek Hyeon Kim
DOI:10.1016/j.tetlet.2011.07.024
日期:2011.9
isothiouronium chloride as a recoverableorganocatalyst for the activation of the imine intermediate through hydrogen bonding is described. A mild and operationally simple fragment coupling procedure was accomplished with a wide range of aldehydes as well as amines in good to excellent yields. In addition, the S-benzyl isothiouronium chloride catalyst was easily recovered by simple filtration and reused
Phosphodiesterase 4 inhibitors, including N-substituted diarylamine analogs
申请人:Schumacher Richard
公开号:US20050222207A1
公开(公告)日:2005-10-06
PDE4 inhibition is achieved by novel compounds, e.g., N-substituted diarylamine analogs. The compounds of the present invention are of Formula I:
wherein A, B, D, R
1
, R
2
, R
3
and R
4
are as defined herein.
Nickel-catalyzed hydrogenative coupling of nitriles and amines for general amine synthesis
作者:Vishwas G. Chandrashekhar、Wolfgang Baumann、Matthias Beller、Rajenahally V. Jagadeesh
DOI:10.1126/science.abn7565
日期:2022.6.24
Efficient and general methods for the synthesis of amines remain in high demand in the chemical industry. Among the many known processes, catalytic hydrogenation is a cost-effective and industrially proven reaction and currently used to produce a wide array of such compounds. We report a homogeneous nickel catalyst for hydrogenative cross coupling of a range of aromatic, heteroaromatic, and aliphatic