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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Patent•
29 Nov 1990
4 citations
4 citations
TL;DR: In this article, an efficient and improved procedure for the synthesis of benzopyran derivatives has been achieved with Keggin-type and Preyssler-type HPA catalysts in one-pot reaction under solvent-free conditions.
Abstract: An efficient and improved procedure for the synthesis of benzopyran derivatives has been achieved with Keggin-type and Preyssler-type heteropolyacids (HPA) catalysts in one-pot reaction under solvent-free conditions.
4 citations
Patent•
12 Sep 1980
TL;DR: In this article, known and novel compounds of formula (I) where R 4 is hydrogen or lower alkyl and R 5 is a substituent are described, as well as methods for producing the compounds and methods for administering the compounds to cure or prevent rhinoviral infections.
Abstract: Known and novel compounds of formula (I)
wherein R 4 is hydrogen or lower alkyl, R 3 is hydrogen or lower alkyl and R 5 is a substituent, or R 3 and R 5 together form a group -CH 2 - or -CH 2 -CH 2 -, and R 1 and R 2 each represent four substituents or one or both R 1 and R 2 represents a methylenedioxy group and two substituents are active against viruses, especially rhinoviruses. Methods for producing the compounds are described, as are pharmaceutical formulations and methods for administering the compounds to cure or prevent rhinoviral infections.
4 citations
4 citations