In the presence of solid base catalyst KF-Al 2O 3, 2-methylbenzothiazole was condensated with aromatic aldehydes in DMF to give 2-styrylbenzothiazoles in yields of 80% to 92%. The maxinum absorption frequencies of the...In the presence of solid base catalyst KF-Al 2O 3, 2-methylbenzothiazole was condensated with aromatic aldehydes in DMF to give 2-styrylbenzothiazoles in yields of 80% to 92%. The maxinum absorption frequencies of the ultraviolet spectra in sixteen organic solvents finely correlate with the Hammett′s substituent coefficients.展开更多
文摘In the presence of solid base catalyst KF-Al 2O 3, 2-methylbenzothiazole was condensated with aromatic aldehydes in DMF to give 2-styrylbenzothiazoles in yields of 80% to 92%. The maxinum absorption frequencies of the ultraviolet spectra in sixteen organic solvents finely correlate with the Hammett′s substituent coefficients.
