Mercury ion induced activation of the C–O bond in a photo-responsive spiropyran
摘要:
The conversion of 7-hydroxy-BIPS in solution from colourless form to colored form can be induced using both light and the addition of Hg2+ ion No significant color change is observed when other ions (Ca2+ Mg2+ Zn2+ Cd2+ Co2+ Cu2+ Mn2+ Fe2+ Ni2+ Pb2+ K+ Na+ Li+ and Ag+) were used (C) 2010 Elsevier Ltd All rights reserved
The 7-acetoxyspiropyrans (4a and 4b) have been prepared by the reaction of Fischer's bases (3) with 2,4-diacetoxybenzaldehyde in refluxing ethanol in moderate yields. The acetyl group of 7-acetoxyspiropyran 4a was easily removed to give a 7-hydroxyspiropyran 6 in high yield under the basic condition.
Improving the Synthesis of Spiropyran Derivatives Using Microwave Irradiation Method
作者:Siti Aishah Hasbullah、Atisya Rohadi、Azwan Mat Lazim、Rumaisa Nordin
DOI:10.3987/com-13-12920
日期:——
A solvent free synthesis of spiropyran derivatives has been developed from the condensation of indoline and salicylaldehyde using a microwave irradiation method. This method starts from readily available starting materials and provides biologically interesting products. The microwave irradiation method was remarkably successful and gave spiropyran derivatives in higher yield (72-99%) with a much shorter reaction time (10-15 min) compared to the conventional heating method. The chemical structures of the compounds prepared were characterized through IR, H-1 NMR and C-13 NMR spectral data.
US5551973A
申请人:——
公开号:US5551973A
公开(公告)日:1996-09-03
US5593486A
申请人:——
公开号:US5593486A
公开(公告)日:1997-01-14
US5633109A
申请人:——
公开号:US5633109A
公开(公告)日:1997-05-27
Synthesis of 7-Hydroxyspiropyran
作者:Young Jin Cho、Seung Hwan Lee、Jong Woo Bae、Sung Hoon Kim、Sam Rok Keum、Cheol Min Yoon
DOI:10.1080/00397910008087399
日期:2000.1
The 7-acetoxyspiropyrans (4a and 4b) have been prepared by the reaction of Fischer's bases (3) with 2,4-diacetoxybenzaldehyde in refluxing ethanol in moderate yields. The acetyl group of 7-acetoxyspiropyran 4a was easily removed to give a 7-hydroxyspiropyran 6 in high yield under the basic condition.