Topic
Benzopyrans
About: Benzopyrans is a research topic. Over the lifetime, 694 publications have been published within this topic receiving 8830 citations.
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TL;DR: In this article, the substitution of bromine in the title bromomethylpyranone 2 with phenylhydrazine as well as thiourea, like sodium acetate, brings about substitution of Bromine with bromide.
Abstract: Phenylhydrazine as well as thiourea, like sodium acetate, brings about substitution of bromine in the title bromomethylpyranone 2. The pyranone 2 gives the pyrano fused oxazine 9 with hydroxylamine, pyridiazines 10 and 11, respectively with hydrazine and phenylhydrazine, and thiophene 16 with thioacetamide.
3 citations
TL;DR: In this paper , a cyclization reaction of photoredox generated ortho-quinone methides using 1,3-diketones for the synthesis of trifluoromethylated 4H-1-benzopyrans with moderate to high yields was described.
3 citations
01 Dec 2011
TL;DR: In this article, multicomponent reactions (MCR) continue to attract significant interest due to their important role in the preparation of structurally diverse chemical structures, such as benzopyran and naphthopyrans.
Abstract: Multicomponent reactions (MCR) continue to attract significant interest due to an important role in the preparation of structurally diverse chemical structures 1 . Benzopyran and benzopyran derived molecules display potent biological and pharmacological activities 2 . Similarly, naphthopyrans, the polyfunctionalized benzopyrans have attracted considerable attention due to their interesting photochromic properties 3 and also their presence in
3 citations
TL;DR: The reaction of homophthaldehyde with 8-(benzylamino)menthol is regio-and diastereo-selective, leading to the chiral perhydro-1,3-benzoxazine 3 as a single diastereoisomer.
3 citations