The SmI<sub>2</sub>/TEU<sup>–</sup>-Mediated Cyclization of Unsaturated Halides
作者:Chriss E. McDonald、Holly D. Bendorf、Joseph R. Mauck、Christopher C. McAtee、Ahren I. Green、David J. Ciccarelli、Cassandra A. Bendyk、Brandon J. Conrad、Angelique T. Delgado
DOI:10.1021/acs.orglett.0c02074
日期:2020.7.17
The combination of SmI2 and the conjugate base of triethylurea (TEU–) has been shown to favor the cyclization of unsaturated halides over direct reduction to a much greater extent than other SmI2-based reductants. Aryl, heteroaryl, and alkyl halides (X = Br, Cl, F) readily undergo heterocyclization and carbocyclization in the presence of SmI2/TEU–.
SMI的组合2和triethylurea的共轭碱(TEU - )已被证明有利于不饱和卤化物超过直接还原到更大的程度比其他SMI环化2系还原剂。在SmI 2 / TEU –的存在下,芳基,杂芳基和卤代烷(X = Br,Cl,F)容易发生杂环化和碳环化。
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
Biocatalysts or deep eutectic solvents (DES) are effective for selective N-alkylation of various aromatic primary amines. These methods avoided complexity of multiple alkylations giving products in good yields. Both DES and lipase can be recycled and re-used at least five times. In addition, these catalysts are biodegradable, non-toxic and cost-effective.