Prostaglandin endoperoxides. 15. Asymmetric total synthesis of levuglandin E2
作者:Robert G. Salomon、Donald B. Miller、Swadesh R. Raychaudhuri、Kamlakar Avasthi、Kasturi Lal、Bruce S. Levison
DOI:10.1021/ja00338a050
日期:1984.12
Synthese du compose du titre a partir du O,O-diethyl methyl-1 acetonyl phosphonate et du bromo-7 heptene-5oate de methyle
Synthese du compose du titre a partir du O,O-diethylmethyl-1 acetonyl phosphonate et du bromo-7 heptene-5oate demethyle
Symmetric anionic polymethine dyes derived from fluorene and its derivatives with electron-acceptor substituents: synthesis and spectral properties
作者:I. V. Kurdyukova、N. A. Derevyanko、A. A. Ishchenko、D. D. Mysyk
DOI:10.1007/s11172-012-0040-7
日期:2012.2
Novel anionic polymethine dyes were synthesized from 2,7-bis(phenoxysulfonyl)-, 2,7-dinitro-, and 2,4,5,7-tetranitrofluorenes. The reasons for the complicated shape of their absorption spectra were analyzed: the formation of contact ion pairs, associates, and conformational isomers and electronic effects of substituents. The quantum chemical calculations by the Pariser—Parr—Pople method and nonempirical
Synthesis and spectral properties of merocyanine dyes based on fluorene and its derivatives
作者:I. V. Kurdyukova、N. A. Derevyanko、A. A. Ishchenko、D. D. Mysyk
DOI:10.1134/s1070363212040172
日期:2012.4
hexamethine merocyaninyes, the derivatives of fluorene, diphenyl 9H-fluorene-2,7-disulfonate, and bis(2,2,3,3,4,4,5,5-octafluoropentyl) 9H-fluorene-2,7-disulfonate, as well as the derivatives of the heterocycles of moderate (indolylidene and benzotiazolylidene), weak (benzo[c,d]indolylidene and 2,6-diphenylpyrane) and strong (2,6-diphenylpyridine) electron-donor properties were synthesized and their absorption