Synthesis of Conjugated Spiropyran Dyes via Palladium-Catalyzed Coupling Reaction
摘要:
Spiropyrans (5a-h) conjugated at 6 position have been conveniently and efficiently prepared by palladium-catalyzed coupling of 6-iodo-spiropyran (4a, 4b) with olefins or alkynes in moderate to high yield. This method might be a particularly very important way as one of structural modifications for further study of spiropyran containing liquid crystals, which might be a potential optical switch (LCOS) developement based on the principle of photoresolution.
Suzuki coupling reaction of 6-iodo- or 6,8-diiodospiropyran: synthesis of spiropyran analogs
作者:Ji Hee Lee、Eun Soo Park、Cheol Min Yoon
DOI:10.1016/s0040-4039(01)01769-5
日期:2001.11
6-Iodospiropyrans and 6,8-diiodospiropyran were coupled with arylboronic acids in the presence of palladium acetate and sodium carbonate in DMF to give the corresponding spiropyrans in high yields. (C) 2001 Published by Elsevier Science Ltd.