105902-38-3Relevant academic research and scientific papers
Reactivity of substrates with multiple competitive reactive sites toward NBS under neat reaction conditions promoted by visible light
Grjol, Bla?,Jereb, Marjan
, p. 5235 - 5248 (2021/06/07)
Regioselectivity of visible-light-induced transformations of a range of (hetero)aryl alkyl-substituted ketones bearing several competitive reactive sites (α-carbonyl, benzyl and aromatic ring) with N-bromosuccinimide (NBS) was studied under solvent-free reaction conditions (SFRC) and in the absence of inert-gas atmosphere, radical initiators and catalysts. An 8-W energy-saving household lamp was used for irradiation. Heterogeneous reaction conditions were dealt with throughout the study. All substrates were mono- or dibrominated at the α-carbonyl position, and additionally, some benzylic or aromatic bromination was observed in substrates with benzylic carbon atoms or electron-donating methoxy groups, respectively. Surprisingly, ipso-substitution of the acyl group with a bromine atom took place with (4-methoxynaphthyl) alkyl ketones. While the addition of the radical scavenger TEMPO (2,2,6,6-tetramethylpiperidin-1-yloxy) decreased the extent of α- and ring bromination, it completely suppressed the benzylic bromination and α,α-dibromination with NBS under SFRC.
A bridge linking and its application of metal complexes
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Paragraph 0073, (2017/02/23)
The invention discloses a bridged metallocene complex, which is characterized by having a structural formula shown as the following A1, A2, A3 or A4. The invention also discloses a preparation method of ethylene propylene rubber. The ethylene propylene ru
A method of preparation of ethylene-propylene-diene rubber
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Paragraph 0047; 0072; 0075, (2017/03/23)
The invention discloses a bridged metallocene complex, which is characterized by having a structural formula shown as the following A1, A2, A3 or A4. The invention also discloses a preparation method of ethylene propylene rubber. The ethylene propylene ru
