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Journal ArticleDOI

Sylvone, a new furanoid lignan of Piper sylvaticum

01 Jan 1984-Tetrahedron (Pergamon)-Vol. 40, Iss: 24, pp 5047-5052
TL;DR: The structure of a 2,3,4 trisubstituted furanoid lignan, designated sylvone, was established as 1 from detailed spectroscopical and chemical studies as discussed by the authors.
About: This article is published in Tetrahedron.The article was published on 1984-01-01. It has received 19 citations till now.
Citations
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Journal ArticleDOI
TL;DR: A review of lignans and neolignans currently known in the Piperaceae can be found in this paper, where the authors summarize the structures and properties of these genera.

38 citations

Journal ArticleDOI
TL;DR: Phytochemical investigation of the aerial parts of H. cordata revealed eight new compounds that were identified as new alkaloids, and the known alkaloid compounds were isolated from this plant for the first time.

34 citations


Additional excerpts

  • ...…sauristolactam (10) (Rao and Reddy, 1990), piperolactam C (11) (Andri et al., 2011), piperolactam B (12) (Olsen et al., 1993), cepharanone B (13) (Barnerji et al., 1984), 7-oxodehydroasimilobine (14) (Hans et al., 1991), lysicamine (15) (Diego et al., 1986), atherospermidine (16) (Wijeratne et…...

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Journal ArticleDOI
TL;DR: In this paper, the direct arylation of C(sp3)H bonds adjacent to oxygen in ethers with phenol and naphthol derivatives was developed via palladium(II) acetate/copper(II)-triflate [Pd(OAc)2/Cu(OTf)2]-catalyzed cross-dehydrgenative coupling in the presence of tert-butyl hyroperoxide (TBHP), which provided exclusive installation of a tetrahydrofuranyl moiety at a more hindered position of multiply substituted phen
Abstract: The direct arylation of C(sp3)H bonds adjacent to oxygen in ethers with phenol and naphthol derivatives was developed via palladium(II) acetate/copper(II) triflate [Pd(OAc)2/Cu(OTf)2]-catalyzed cross-dehydrgenative coupling in the presence of tert-butyl hyroperoxide (TBHP). This process provides exclusive installation of a tetrahydrofuranyl moiety at a more hindered position of multiply substituted phenol derivatives. The cross-dehydrogenative coupling of 1,4-dihydroxynaphthalene with cyclic ethers and free alcohols afforded biologically interesting 2-substituted 1,4-naphthoquinone derivatives.

34 citations

Journal ArticleDOI
TL;DR: In this paper, four highly oxygenated polyphenols from the stem bark of Cordia goetzei Gurke (Boraginaceae) and their structures elucidated by a combination of one-and two-dimensional (including COLOC) NMR spectroscopic techniques, mass spectroscopy, and chemical methods.
Abstract: Four highly oxygenated polyphenols 1–4, have been isolated from the stem bark of Cordia goetzei Gurke (Boraginaceae) and their structures elucidated by a combination of one- and two-dimensional (including COLOC) NMR spectroscopic techniques, mass spectroscopy, and chemical methods. The first new compound, cordigone (1), is a tetrahydrofuran derivative and the second one, cordigol (2), a furobenzopyran derivative. The benzofurans 3 and 4 are orange pigments, responsible for the coloration of the stem bark of the tree. All four polyphenols are fungicidal against cladosporium cucumerinum.

33 citations

Journal ArticleDOI
TL;DR: In this article, the furanoketone, (+)-episesaminone, was isolated and fully characterized in part via hemisynthesis from (+)-sesamolin.
Abstract: Several lignans from Sesamum sp. contain an unusual oxygen insertion between their furano and aromatic rings. As part of our ongoing studies to clarify the biosynthetic pathway to the sesame lignans, the furanoketone, (+)-episesaminone, was isolated and fully characterized in part via hemisynthesis from (+)-sesamolin.

25 citations

References
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Journal ArticleDOI
TL;DR: Four lignans were isolated from the flower buds of Magnolia fargesii Cheng, two of which were known lignan, pinoresinol dimethyl ether and liriores inol-B dim methyl ether; the other two were new lignANS, magnolin and fargein.

53 citations

Journal ArticleDOI
TL;DR: The structure of sylvatine (1), a new alkamide from Piper sylvaticum, has been elucidated from spectroscopic studies, chemical reactions and correlation with compounds of known structures as mentioned in this paper.

15 citations

Journal ArticleDOI
TL;DR: Sylvamide, a new amide derivative, has been isolated from the petrol extract of the seeds of Piper sylvaticum (Roxb) from spectral and chemical properties as discussed by the authors.

10 citations

Journal ArticleDOI
TL;DR: Spektroskopische Strukturaufklärung eines Inhaltsstoffes (Alkaloid) aus Piper sylvaticum Roxb.
Abstract: Spektroskopische Strukturaufklarung eines Inhaltsstoffes (Alkaloid) ausPiper sylvaticum Roxb. mit teils synthetischer Beweisfuhrung.

7 citations