Steric and substituent effects on the photoreversibility of novel indolospirobenzopyrans: Acid deuterolysis, UV and 1H NMR spectroscopy

Autor:	Peter G. Sammes, Ayse Abdullah, Craig J. Roxburgh
Rok vydání:	2009
Předmět:	Steric effects Indole test chemistry.chemical_compound 1h nmr spectroscopy chemistry Process Chemistry and Technology General Chemical Engineering Substituent Photochemistry Isomerization Medicinal chemistry
Zdroj:	Dyes and Pigments. 82:226-237
ISSN:	0143-7208
DOI:	10.1016/j.dyepig.2009.01.006
Popis:	The photoreversibility of several novel indolospirobenzopyrans was investigated using temperature studies – monitored using 1H NMR spectroscopy, qualitative UV studies and acid deuterolysis (trifluorodeuterioacetic acid (TFA-D)) catalysed isomerisation studies. Derivatives that contained appropriately placed electronically modifying substituents on both the indole and benzopyran-rings; also variants possessing sterically hindering (with regard to spiropyran-opening ↔ closing reaction) groups, within the spirocyclic ring-system were prepared. In addition, compounds that contained both sterically restricting and electronically biasing substituents, were investigated, simultaneously.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e5f1dcad10f222a86a4709d9892aed26 https://doi.org/10.1016/j.dyepig.2009.01.006 Zobrazit plný text záznamu Full Text from ScienceDirect