Reductive Alkylation of Amines with Carboxylic Ortho Esters
作者:Renat Kadyrov、Konrad Moebus
DOI:10.1002/adsc.202000510
日期:2020.8.19
carboxylic ortho esters could be used as an alkylating agent in the reductivealkylation of amines. A variety of amines, including amino acid esters, were alkylated affording mono‐alkylated products with high selectivity in practical to high yields using standard heterogeneous catalysts. By applying acyclic ortho esters alkylation was completed at room temperature.
Enantioselective 1,4-addition of aromatic nucleophiles to alpha,beta-unsaturated aldehydes using chiral organic catalysts
申请人:——
公开号:US20030236438A1
公开(公告)日:2003-12-25
Nonmetallic, chiral organic catalysts are used to catalyze the 1,4-addition of an aromatic nucleophile to an &agr;,&bgr;-unsaturated aldehyde. The aromatic nucleophile may be an N,N-disubstituted aniline compound, or an analog thereof. The reaction is efficient and enantioselective, and proceeds with a variety of substituted and unsubstituted aromatic nucleophiles and aldehydes. The invention also provides a method for the deamination of aromatic N,N-disubstituted amines such as those resulting from the 1,4-addition of an aromatic nucleophile to an &agr;,&bgr;-unsaturated aldehyde.
Palladium-Catalyzed Synthesis of <i>N</i>,<i>N-</i>Dimethylanilines via Buchwald–Hartwig Amination of (Hetero)aryl Triflates
作者:Tobias Taeufer、Jola Pospech
DOI:10.1021/acs.joc.0c00491
日期:2020.6.5
This work delineates the synthesis of N,N-dimethylaniline derivativesfrom dimethylamines and aryl triflates. The palladium-catalyzedC–Nbond formation proceeds in excellent yields, using an unsophisticated catalytic system, a mild base, and triflates as electrophiles, which are readily available from inexpensive phenols. N,N-Dimethylanilines are multifunctional reaction partners and represent useful
Olefin polymerisation catalysts and processes for producing olefin polymers
申请人:TOSOH CORPORATION
公开号:EP0849292A1
公开(公告)日:1998-06-24
Catalysts for olefin polymerization which consist essentially of a transition metal compound, a modified clay compound and an organic aluminum compound, wherein the modified clay compound comprises a reaction product of a clay mineral and a proton acid salt of a specific amine compound, as well as a method of polymerizing olefins using such catalysts. It is possible thereby to obtain olefin polymers with high productivity and low ash content.