Reaktion von Schwefelkohlenstoff mit 3-Amino-2-cyano-2-penten-1,5-carbons�urediethylester: Eine einfache Synthese polyfunktionell substituierter Thiophene und ihrer kondensierten Derivate
摘要:
Carbon disulfide added to the active methylene group in 1 in basic DMF at room temperature to yield the non-isolable 1:1 adduct 2. In-situ cyclization of the latter with some alpha-bromo compounds afforded the corresponding polyfunctionally substituted thiophenes 5. The reactivity of 5 towards a variety of reagents was studied. Chemical and spectroscopic evidences for the structure of the new compounds are provided.
Reaktion von Schwefelkohlenstoff mit 3-Amino-2-cyano-2-penten-1,5-carbons�urediethylester: Eine einfache Synthese polyfunktionell substituierter Thiophene und ihrer kondensierten Derivate
摘要:
Carbon disulfide added to the active methylene group in 1 in basic DMF at room temperature to yield the non-isolable 1:1 adduct 2. In-situ cyclization of the latter with some alpha-bromo compounds afforded the corresponding polyfunctionally substituted thiophenes 5. The reactivity of 5 towards a variety of reagents was studied. Chemical and spectroscopic evidences for the structure of the new compounds are provided.