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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TL;DR: In this article, the enantiomeric purities of the final aminochroman derivatives were determined by capillary electrophoresis using β-cyclodextrins as a chiral selector.
Abstract: Enantiomerically pure 5-acetyl-3-amino-3,4-dihydro-2H-1-benzopyran and methyl 3-amino-3,4-dihydro-2H-1-benzopyran-5-carboxylate were successfully synthesized starting from d- or l-serine. The formation of the benzopyran ring involved a radical cyclization step. The enantiomeric purities of the final aminochroman derivatives were determined by capillary electrophoresis using β-cyclodextrins as a chiral selector.
2 citations
Journal Article•
2 citations
Patent•
18 Dec 1985
TL;DR: A compound expressed by formula I (ring A is benzopyran ring, tetrahydroquinoline ring or indoline ring; R is phenyl or pyridyl which may have a substituent group; n is 0 or 1 or an acid addition salt thereof) is reacted with a compound expressing by formula III (X is halogen) in the presence of a base, e.g. NaHCO 3, NaOH or prinear acid, in a solvent, at 60W110°C for 20minW6hr to afford the aimed
Abstract: NEW MATERIAL:A compound expressed by formula I (ring A is benzopyran ring, tetrahydroquinoline ring or indoline ring; which may have a substituent group; R is phenyl or pyridyl which may have a substituent group; n is 0 or 1 or an acid addition salt thereof. EXAMPLE: 2-[(3-Methyl-2-pyridyl)methylthio]pyrano[3,2-e]benzimidazole. USE: An antiulcer agent, analgesic agent and anti-inflammatory agent. PREPARATION: A compound expressed by formula II is reacted with a compound expressed by formula III (X is halogen) in the presence of a base, e.g. NaHCO 3 , NaOH or pyridine, in a solvent, e.g. benzene, methanol, DMF or waster, at 60W110°C for 20minW6hr to afford the aimed compound expressed by formula I etc. COPYRIGHT: (C)1987,JPO&Japio
2 citations
2 citations
TL;DR: A new gold(I) complex is used as an efficient catalyst for intramolecular cycloisomerizations to afford benzopyran and oxazoline in high yields.
Abstract: A new gold(I) complex is used as an efficient catalyst for intramolecular cycloisomerizations to afford benzopyran (II) and oxazoline (VI) in high yields.
2 citations