Cation Complexation, Photochromism, and Reversible Ion-Conducting Control of Crowned Spironaphthoxazine
摘要:
A spironaphthoxazine derivative incorporating a monaza-12-crown-4 moiety at the 5'-position has been designed as a light-resistant, cation-complexable photochromic compound. Complexation of alkali metal ions by the crown moiety in the crowned spironaphthoxazine allows the spironaphthoxazine skeleton to isomerize to its corresponding open colored form, even under dark conditions. Specifically, Li+ complexation greatly stabilizes the open colored form due to the intramolecular interaction between its oxo group and crown-complexed cation, as well as the selective Li+ complexation of its 12-crown-4 moiety. Taking advantage of the high Li+ selectivity in the cation-induced isomerization of crowned spironaphthoxazine, the thermal stability of the open colored form can be modulated continuously by added Li+ concentrations. Even in the presence of the metal ion, UV- and visible-light irradiation led to further isomerization to the open form and back-isomerization to the initial closed form, respectively. Photoisomerization of crowned spironaphthoxazine to its open form promoted Li+ binding due to the additional axial interaction with the crown-complexed Li+, while that back to the closed form attenuated the cation binding. The photoinduced change in the cation-binding ability of crowned spironaphthoxazine, which possesses high light-fatigue resistance, has led to a highly reversible, photochemical switching system of ionic conduction.
Cation Complexation, Photochromism, and Reversible Ion-Conducting Control of Crowned Spironaphthoxazine
摘要:
A spironaphthoxazine derivative incorporating a monaza-12-crown-4 moiety at the 5'-position has been designed as a light-resistant, cation-complexable photochromic compound. Complexation of alkali metal ions by the crown moiety in the crowned spironaphthoxazine allows the spironaphthoxazine skeleton to isomerize to its corresponding open colored form, even under dark conditions. Specifically, Li+ complexation greatly stabilizes the open colored form due to the intramolecular interaction between its oxo group and crown-complexed cation, as well as the selective Li+ complexation of its 12-crown-4 moiety. Taking advantage of the high Li+ selectivity in the cation-induced isomerization of crowned spironaphthoxazine, the thermal stability of the open colored form can be modulated continuously by added Li+ concentrations. Even in the presence of the metal ion, UV- and visible-light irradiation led to further isomerization to the open form and back-isomerization to the initial closed form, respectively. Photoisomerization of crowned spironaphthoxazine to its open form promoted Li+ binding due to the additional axial interaction with the crown-complexed Li+, while that back to the closed form attenuated the cation binding. The photoinduced change in the cation-binding ability of crowned spironaphthoxazine, which possesses high light-fatigue resistance, has led to a highly reversible, photochemical switching system of ionic conduction.
3,3-bis(aryl)-5-((N-(un)substituted)amido)naphthopyrans, their preparation, compositions and (co)polymer matrices containing them
申请人:Corning S.A.
公开号:EP1038870A1
公开(公告)日:2000-09-27
The object of the present invention is novel naphthopyran compounds as well as the compositions and (co)polymer matrices containing them. Said compounds have interesting photochromic properties. Another object of the present invention is a method of preparing said novel compounds.
Enantioselective Oxidative Biaryl Coupling Reactions Catalyzed by 1,5-Diazadecalin Metal Complexes: Efficient Formation of Chiral Functionalized BINOL Derivatives
作者:Xiaolin Li、J. Brian Hewgley、Carol A. Mulrooney、Jaemoon Yang、Marisa C. Kozlowski
DOI:10.1021/jo0340206
日期:2003.7.1
ligands in the enantioselectiveoxidative biaryl coupling of substituted 2-naphtholderivatives. Under the optimal conditions employing 2.5-10 mol % of a 1,5-diaza-cis-decalin copper(II) catalyst with oxygen as the oxidant, enantioselectivecouplings (44-96% ee) could be achieved for a range of 3-substituted 2-naphthols including the ester, ketone, phosphonyl, and sulfonyl derivatives. The relationship
shown that Sudan I (1) exists as a tautomeric mixture. The effect of the solvents is minimized by the existing intramolecular hydrogen bond. Therefore, the influence on the tautomeric state in structurally modified 1 has been investigated. Structure 2 contains an additional OH-group, which deprotonates easily and affects the position of the tautomericequilibrium by changing the electronic properties
1-N-alkyl-5'-[(N'-(un)substituted)amido]spiroindolinonaphthoxazines, their preparation, compositions and (co)polymer matrices containing them
申请人:Corning S.A.
公开号:EP1044978A3
公开(公告)日:2001-05-09
The object of the present invention is novel spiroindolinonaphthoxazine compounds as well as the compositions and (co)polymer matrices containing them. Said compounds have interesting photochromic properties. Another object of the present invention is a method of preparing said novel compounds.
[EN] COMPOUNDS USEFUL IN THE TREATMENT OF INFLAMMATORY DISEASES<br/>[FR] COMPOSES UTILISES DANS LE TRAITEMENT DE MALADIES INFLAMMATOIRES
申请人:GLAXO GROUP LTD
公开号:WO2000037444A1
公开(公告)日:2000-06-29
There are provided according to the invention, novel compounds of formula (I) wherein R?1, R2, R3, R4, R5 and R6¿ are as defined in the specification, processes for preparing them, formulations containing them and their use in therapy for the treatment of inflammatory diseases.