Synthesis, Resolution, and Stabilities of a Cationic Chromenoxanthene [4]helicene
作者:Joyram Guin、Céline Besnard、Jérôme Lacour
DOI:10.1021/ol1003466
日期:2010.4.16
1,13-Dimethoxychromenoxanthenium, a key intermediate in the synthesis of the classical trioxatriangulenium cation, was isolated and characterized for the first time. This [4]helicene was resolved through a CSP-HPLC procedure, with chemical and configurational stabilities being determined and compared.
SMITH, R. J.;MILLER, T. M.;PAGNI, R. M., J. ORG. CHEM., 1982, 47, N 22, 4181-4188
作者:SMITH, R. J.、MILLER, T. M.、PAGNI, R. M.
DOI:——
日期:——
Synthesis and fluorescence properties of DMCX+—a stable oxygen-bridged [4]helicenium dye
作者:Thomas Just Sørensen、Anders Ø. Madsen、Bo W. Laursen
DOI:10.1016/j.tetlet.2012.11.092
日期:2013.2
A one-step synthesis of the stable [4]helicenium dye, 1,13-dimethoxy-chromeno[2,3,4-kl]xanthenium hexafluorophosphate (DMCX+) from the readily available tris(2,6-dimethoxyphenyl)carbenium ion is reported. The crystal structure, the chemical stability, and dye properties of the DMCX+ helicenium system are described.