Synthesis of Novel Photochromic Spiro Compounds based on Thieno[3,2-<i>b</i>]Pyrroles
作者:A. A. Shimkin、D. M. Nikalin、V. Z. Shirinian、M. M. Krayushkin、L. G. Vorontsova、A. V. Metelitsa、V. I. Minkin
DOI:10.1080/15421400590946631
日期:2005.6.1
ABSTRACT Two routes to thieno[3,2-b]pyrrolenines are developed and new spiropyranes and spirooxazines based on thienopyrrole are synthesized. Benzene ring in the chromene part of the spiro molecule is also replaced with thiophene one to give new merocyanines.
The reaction of 1-benzothiophen-3(2H)-one hydrazone with various ketones under different conditions has been studied and a convenient method has been proposed for the synthesis of thienopyrrole derivatives. The method is applicable to the preparation of 1H- and 3H-benzothienopyrroles with a range of substituents.
Synthesis of thieno[3.2-b]pyrrolenine derivatives under the Fischer reaction conditions
作者:V. Z. Shirinian、M. M. Krayushkin、D. M. Nikalin、A. A. Shimkin
DOI:10.1007/s11172-005-0313-5
日期:2005.3
The reaction of alkyl 4-(2-acetylhydrazino)-2-methyl-3-thiophenecarboxylates with 3-methylbutan-2-one was carried out under the Fischer reaction conditions. The influence of Lewis acids and solvents on the process was studied. A convenient method for the synthesis of thieno [3.2-b]pyrrolenine derivatives was proposed.