Herein, we demonstrated an efficient protocol for reductivealkylation of azides/nitro compounds via a borrowing hydrogen (BH) method. By following this protocol, selective mono- and dialkylated amines were obtained under mild and solvent-free conditions. A series of control experiments and deuterium-labeling experiments were performed to understand this catalytic process. Mechanistic studies suggested
Scalable synthesis of secondary and tertiary amines by heterogeneous Pt-Sn/γ-Al2O3 catalyzed N-alkylation of amines with alcohols
作者:Kaikai Wu、Wei He、Chenglin Sun、Zhengkun Yu
DOI:10.1016/j.tet.2016.11.029
日期:2016.12
Synthesis of secondary and tertiaryamines has been efficiently realized from the N-alkylation of amines with alcohols by means of heterogeneous bimetallic Pt-Sn/γ-Al2O3 catalyst (0.5 wt % Pt, molar ratio Pt:Sn = 1:3) through a borrowing hydrogen strategy. The Pt-Sn/γ-Al2O3 catalyst has exhibited very high catalytic activity towards a wide range of amines and alcohols, and can be conveniently recycled
Oxidation–Reduction Condensation of Diazaphosphites for Carbon–Heteroatom Bond Formation Based on Mitsunobu Mechanism
作者:Hai Huang、Jun Yong Kang
DOI:10.1021/acs.orglett.6b03709
日期:2017.2.3
An efficient oxidation–reduction condensation reaction of diazaphosphites with various nonacidic pronucleophiles in the presence of DIAD as a weak oxidant has been developed for carbon–heteroatombond formation. This mild process affords structurally diverse tertiary amines, secondary amines, esters, ethers, and thioethers in moderate to excellent yields. The selective synthesis of secondary amines
and green method for the selectivesynthesis of tertiary amines has been developed that involves iridium-catalyzed alkylation of various primary amines with aromatic or aliphatic alcohols. Notably, the catalytic protocol enables this transformation in the absence of additional base and solvent. Furthermore, the alkylation of nitrobenzene with primary alcohol to tertiary amine has also been achieved by
Efficient metal-free hydrosilylation of tertiary, secondary and primary amides to amines
作者:Enguerrand Blondiaux、Thibault Cantat
DOI:10.1039/c4cc02894e
日期:——
Hydrosilylation of secondary and tertiary amides to amines is described using catalytic amounts of B(C6F5)3. The organic catalyst enables the reduction of amides with cost-efficient, non-toxic and air stable PMHS and TMDS hydrosilanes. The methodology was successfully extended to the more challenging reduction of primary amides.