Synthesis and structure of indoline spiropyrans based on benzo[f]coumarin
作者:O. G. Nikolaeva、O. Yu. Karlutova、A. A. Guseva、E. B. Gaeva、A. G. Starikov、A. D. Dubonosov、V. A. Bren、A. V. Metelitsa、V. I. Minkin
DOI:10.1007/s11172-020-2912-6
日期:2020.7
Indoline spiropyrans containing benzo[f]coumarin moiety annulated to the 2H-pyran cycle were synthesized. The obtained compounds exist in solutions as a tautomeric mixture of their spirocyclic and merocyanine forms. The spiro form exhibits an enhanced resistance to UV irradiation and does not rearranges into the merocyanine isomer in the temperature range of 278–303 K.
合成了含有与 2H-吡喃循环成环的苯并[f]香豆素部分的二氢吲哚螺吡喃。所得化合物以其螺环和部花青形式的互变异构混合物存在于溶液中。螺形式对紫外线照射具有增强的抵抗力,并且在 278-303 K 的温度范围内不会重新排列成部花青异构体。
Synthesis and studies of new photochromic spiropyrans containing a formylcoumarin fragment
作者:O. G. Nikolaeva、A. V. Metelitsa、A. S. Cheprasov、O. Yu. Karlutova、A. G. Starikov、A. D. Dubonosov、V. A. Bren´、V. I. Minkin
DOI:10.1007/s11172-016-1396-x
日期:2016.4
A computer search for new photoactive compounds among indoline spiropyrans of coumarin series was carried out using DFT B3LYP/6-31G(d,p) method. Based on the data obtained, the spiropyrans containing a formylcoumarin fragment annulated to the 2H-pyran ring and possessing photochromic properties were synthesized. The structure and photochromism of these compounds were studied by 1H NMR, IR, and UV/Vis
Novel photochromic indolinospiropyrans of coumarin series with high level of colorability
作者:Anatoly V. Metelitsa、Olga G. Nikolaeva、Alexander S. Cheprasov、Olga Yu. Karlutova、Anastasia A. Burtseva、Alexander D. Dubonosov、Vladimir A. Bren、Vladimir I. Minkin
DOI:10.1016/j.jphotochem.2016.01.019
日期:2016.5
Indolinospiropyrans containing coumarin moiety annulated to the 2H-pyran ring at the 6,5-position exhibit positive photochromism under normal conditions and are characterized by exceptionally high values of colorability. Both strong electron donating and electron withdrawing 5-R substituents in the indoline moiety provide for the noticeable decrease of colorability. Negative solvatochromism of merocyanine
Photo- and thermochromic spiropyrans 43*. Spectral kinetic study of new benzoxazolyl-substituted spirobenzopyrans
作者:Irina А. Rostovtseva、Ekaterina V. Solov’eva、Anatoly V. Chernyshev、Nikolai A. Voloshin、Nadezhda S. Trofimova、Anatoly V. Metelitsa
DOI:10.1007/s10593-015-1688-3
日期:2015.3
[GRAPHICS]A series of spiroindolinebenzopyrans was prepared, containing a chelating 1,3-benzoxazole group at position 8 of the benzopyran fragment. These new benzoxazolyl-substituted spirobenzopyrans showed photochromic properties in solutions with similar quantum yield values for the direct and reverse photoreactions.
Synthesis and photochromic properties of spiropyrans containing a fused benzopyranone fragment
作者:O. G. Nikolaeva、E. B. Gaeva、E. N. Shepelenko、A. V. Tsukanov、A. V. Metelitsa、B. S. Luk’yanov、A. D. Dubonosov、V. A. Bren’、V. I. Minkin
DOI:10.1134/s1070428009070173
日期:2009.7
New spiro compounds of the indole, phthalazine, isobenzofuran, and benzopyran series, containing a fused benzopyranone fragment in the chromene moiety, were synthesized. Indole derivatives were found to exhibit photochromic properties under stationary conditions at 293 K. The thermal stability of merocyanine isomers sharply decreases upon introduction of electron-withdrawing nitro group into the indole fragment and fusion of a benzene ring to the chromene fragment.