Bis(amidate)bis(amido) Titanium Complex: A Regioselective Intermolecular Alkyne Hydroamination Catalyst
作者:Jacky C.-H. Yim、Jason A. Bexrud、Rashidat O. Ayinla、David C. Leitch、Laurel L. Schafer
DOI:10.1021/jo402668q
日期:2014.3.7
o) titanium precatalyst for the anti-Markovnikov hydroamination of alkynes is reported. Hydroamination of terminal and internal alkynes with primary alkylamines, arylamines, and hydrazines is promoted by 5–10 mol % of Ti catalyst. Various functional groups are tolerated including esters, protected alcohols, and imines. The in situ generated complex shows comparable catalytic activity, demonstrating
Simple pyrazole based palladacycle-phosphine with a high turnover has been developed and applied for the N-alkylation of amines and sulfanilamide using alcohols as substrates by hydrogen borrowing strategy. N-alkylation of primary and secondary amines resulted in high isolated yields at 100–130 °C, under solvent free conditions. More challenging secondary aliphatic as well as aromatic alcohols were
Using microwave technology, a new protocol has been developed that improves the reaction rate and overall efficiency of the directreductive amination of ketones with anilines. When using sodium triacetoxyborohydride as the reducing agent, high product yields and increased reaction rates are achieved for a variety of electronically different anilines. Furthermore, we have found that this protocol can
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
A new domino reaction of N-alkoxy(arylmethyl)amines to N-alkyl arylamines, consisting of three types of reactions: elimination of alcohol, rearrangement of the aryl group, and addition of an organolithium or a magnesium reagent, has been developed for the first time.