4534-10-5Relevant academic research and scientific papers
Axially Chiral Dibenzazepinones by a Palladium(0)-Catalyzed Atropo-enantioselective C?H Arylation
Newton, Christopher G.,Braconi, Elena,Kuziola, Jennifer,Wodrich, Matthew D.,Cramer, Nicolai
supporting information, p. 11040 - 11044 (2018/07/31)
Atropo-enantioselective C?H functionalization reactions are largely limited to the dynamic kinetic resolution of biaryl substrates through the introduction of steric bulk proximal to the axis of chirality. Reported herein is a highly atropo-enantioselective palladium(0)-catalyzed methodology that forges the axis of chirality during the C?H functionalization process, enabling the synthesis of axially chiral dibenzazepinones. Computational investigations support experimentally determined racemization barriers, while also indicating C?H functionalization proceeds by an enantio-determining CMD to yield configurationally stable eight-membered palladacycles.
Preparation method of 3-methyl-4-isopropylaniline
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Paragraph 0027-0030, (2017/03/08)
The invention relates to a preparation method of 3-methyl-4-isopropylaniline. The preparation method includes the following steps: (1) dissolving m-toluidine in sulfuric acid solution 50-98% in mass concentration as a component 1, then adding an isopropyl
Intramolecular Selectivity of the Alkylation of Substituted Anilines by Gaseous Cations
Attina, Marina,Cacace, Fulvio,de Petris, Giulia
, p. 1556 - 1561 (2007/10/02)
The intramolecular selectivity of the electrophilic reactions of Et(1+), i-Pr(1+), and Me2F(1+) cations with substituted anilines, including m-toluidine, m-anisidine, and m- and p-fluoroaniline, has been investigated in the dilute gas state at pressures ranging from 100 to 720 torr by a radiolytic technique, complemented by chemical ionization mass spectrometry.The results indicate an appreciable kinetic bias for the nitrogen atom, leading to predominant N-methylation by Me2F(1+).The reactivity of the carbenium ions is complicated by the simultaneous occurrence of proton transfer, in particular to the NH2 group, which increases the relative extent of ring alkylation.The positional selectivity is characterized, aside from the usual orienting effects of the substituents, by the enchanced reactivity of the ring positions ortho to an n-type substituent, irrespective of its activating or deactivating properties.The effect is traced to the preliminary formation of an electrostatic adduct between the aniline and the gaseous electrophile.
2,6-Dinitroaniline herbicides
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, (2008/06/13)
The invention is the use of substituted 2,6-dinitroaniline compounds as preemergence herbicides and compositions employing the substituted 2,6-dinitroaniline compounds.
