Topic
Benzopyran
About: Benzopyran is a research topic. Over the lifetime, 1889 publications have been published within this topic receiving 15235 citations.
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1 citations
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TL;DR: By condensation of 4-trifluoroacetylresorcinol with cyanoacetic ester, the structure of 2-alkylidenebenzopyrans was proven by an x-ray diffraction investigation.
Abstract: By condensation of 4-trifluoroacetylresorcinol with cyanoacetic ester, we have obtained 4-trifluoromethyl-7-hydroxy-2-cyanocarbethoxymethylene-2H-1-benzopyran, the structure of which has been proven by an x-ray diffraction investigation. The presence of an elelctron-acceptor group in the 4 position of the benzopyran nucleus leads to a decrease in the degree of charge separation in 2-alkylidenebenzopyrans. We present the lasing characteristics of the compound obtained.
1 citations
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21 Sep 2016
TL;DR: In this paper, a benzopyran-thiophane derivative with antibacterial activity and a synthesis method and application of the derivative were described. But they did not specify a structural formula for the derivative.
Abstract: The invention discloses a benzopyran-thiophane derivative with antibacterial activity and a synthesis method and application of the benzopyran-thiophane derivative. A structural formula (I) of the benzopyran-thiophane derivative is as shown in the specification, wherein R1 is selected from hydrogen, chlorine, bromine or methoxyl, and R2 is selected from hydrogen, chlorine, bromine, methyl, methoxyl or trifluoromethyl. The benzopyran-thiophane derivative has an excellent antibacterial effect and can be used as a potential antibacterial agent.
1 citations
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18 Dec 1997
TL;DR: In this article, a novel 3,4 BUFFER - DIHYDRO - 6 - METHYL - 4 - PHENYL - 2H - benzopyran - 2 - OL, of formula (IV) and a process IMPROVED PREPARATION OF TOLTERODINE.
Abstract: The invention relates to a novel 3,4 BUFFER - DIHYDRO - 6 - METHYL - 4 - PHENYL - 2H - benzopyran - 2 - OL, of formula (IV) and a process IMPROVED PREPARATION OF TOLTERODINE.
1 citations