期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 42, 页码 18670-18678出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202007595
关键词
atropisomers; diarylamines; dynamic stereochemistry; free energy surface; molecular dynamics
资金
- University of Bristol
- EPSRC [EP/P020267/1, EP/P027067]
- EPSRC through Centre for Doctoral Training in Synthesis for Biology and Medicine - AstraZeneca [EP/L015838/1]
- Diamond Light Source
- Defence Science and Technology Laboratory
- Evotec
- GlaxoSmithKline
- Janssen
- Novartis
- Pfizer
- Syngenta
- Takeda
- UCB
- Vertex
- Oxford-Radcliffe Scholarship
- University of Edinburgh
- EPSRC [EP/P027067/1] Funding Source: UKRI
In common with other hindered structures containing two aromatic rings linked by a short tether, diarylamines may exhibit atropisomerism (chirality due to restricted rotation). Previous examples have principally been tertiary amines, especially those with cyclic scaffolds. Little is known of the structural requirement for atropisomerism in structurally simpler secondary and acyclic diarylamines. In this paper we describe a systematic study of a series of acyclic secondary diarylamines, and we quantify the degree of steric hindrance in theorthopositions that is required for atropisomerism to result. Through a detailed experimental and computational analysis, the role of eachortho-substituent on the mechanism and rate of conformational interconversion is rationalised. We also present a simple predictive model for the design of configurationally stable secondary diarylamines.
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