作者:Chingakham B. Singh、Veerababurao Kavala、Akshaya K. Samal、Bhisma K. Patel
DOI:10.1002/ejoc.200600937
日期:2007.3
Direct N-alkylation of primary amines to secondary/tertiary amines and of secondary amines to tertiary amines has been achieved in excellent yields by employing alkyl, benzylic and allylic halides in the presence of NaHCO3 in an aqueous medium at an elevated temperature. Amines of different stereoelectronic nature react with ease with different halides. The selective formation of secondary amines and
Bis(2-cycloazylindolyl)titanium Complexes: Synthesis, Characterization, and the Catalytic Behaviors towards Hydroamination and Ring-opening Polymerization of ϵ-Caprolactone
作者:Jing-Jing Zhao、Hao Pei、Yan-Mei Chen、Ning Lu、Jin-Na Liu、Jin-Fa Hu、Wei Liu、Wu Li、Yahong Li
DOI:10.1002/zaac.201500072
日期:2015.6
corresponding complexes Ti(L1)2(NMe2)2 (1) and Ti(L2)2(NMe2)2 (2), respectively. The titaniumcomplexes were fully characterized by NMR measurement and elemental analysis as well as the single-crystal X-ray diffraction of 1 and 2. Both 1 and 2 exhibit high activities towards intermolecular hydroamination of terminal alkynes with high selectivity, and they also efficiently promote the ring-opening polymerization
However, catalysts developed thus far that are effective for this process remain quite scarce and are only limited to a few ruthenium and iridium complexes. In this work, we present a cobalt-catalyzedselectivealkylation of amines with amines to synthesize a large variety of secondary amines. A range of amine substrates have been converted to the corresponding products through hetero- or homocoupling