Spiral hexatrienes. The hindered cis isomer of mini-carotene-3 and hexakis-(2,2′,4,4′,6,6′-trifluoromethyl)stilbene

Autor:	J.R. Thiel, Robert S. H. Liu, Rong-liang Chen, Leticia U. Colmenares
Rok vydání:	1994
Předmět:	Steric effects Trifluoromethyl Absorption spectroscopy Stereochemistry medicine.medical_treatment Organic Chemistry Carotene Chromophore Polyene Biochemistry NMR spectra database chemistry.chemical_compound chemistry Drug Discovery medicine Cis–trans isomerism
Zdroj:	Tetrahedron Letters. 35:7177-7180
ISSN:	0040-4039
DOI:	10.1016/0040-4039(94)85354-1
Popis:	Steric crowding in the cis isomer of “Mini-3”, a chain shortened triene analog of β-carotene, and hexakis-(2,2′,4,4′,6,6′-trifluoromethyl)stilbene forces the polyene chromophores to adopt a spiral conformation. Some of the associated unusual spectroscopic properties (UV-VIS and NMR) of these compounds and a rare 1,7-H shift process are described.
Databáze:	OpenAIRE
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