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Volumn 48, Issue 25, 2009, Pages 4521-4523

A unified strategy for exceptionally high diastereoselectivity in the photochemical ring closure of chiral diarylethenes

Author keywords

Diastereoselectivity; Electrocyclization; Photochromism

Indexed keywords

CARBON ATOMS; DIARYLETHENES; DIASTEREOSELECTIVE; DIASTEREOSELECTIVITY; ELECTROCYCLIZATION; RING CLOSURES;

EID: 70349964344     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200901156     Document Type: Article
Times cited : (49)

References (38)
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    • See the Supporting Information.
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    • In the 1HNMR spectrum (270 MHz in CDCl2CDCl 2) the coalescence temperature of the signals corresponding to the methyl group at C2 of l,2-bis(2-methyl-3-benzothienyl)hexafluorocyclopentene (8; site exchange of antiparallel and parallel conformations) was 85 °C Coalescence of signals corresponding to any proton in 3 was not observed at temperatures lower than 125 °C (270MHz in CDC12CDC12 2, Therefore the conformational change to establish the Boltzmann equilibrium at low temperature (such as -70 °C) is not possible within a short time even for 8, and is naturally not possible for more crowded 3
    • 2). Therefore the conformational change to establish the Boltzmann equilibrium at low temperature (such as -70 °C) is not possible within a short time even for 8, and is naturally not possible for more crowded 3.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.