2017
DOI: 10.1021/acs.jnatprod.6b00953
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Complementarity of DFT Calculations, NMR Anisotropy, and ECD for the Configurational Analysis of Brevipolides K–O from Hyptis brevipes

Abstract: Brevipolides K-O (1-5), five new cytotoxic 6-(6'-cinnamoyloxy-2',5'-epoxy-1'-hydroxyheptyl)-5,6-dihydro-2H-pyran-2-ones (IC values against six cancer cell lines, 1.7-10 μM), were purified by recycling HPLC from Hyptis brevipes. The structures, containing a distinctive tetrahydrofuran ring, were established by comprehensive quantum mechanical calculations and experimental spectroscopic analysis of their NMR and ECD data. Detailed analysis of the experimental NMR H-H vicinal coupling constants in comparison with… Show more

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Cited by 31 publications
(36 citation statements)
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“…This compound is structurally similar to hypurticin ( 167 ) that presents an acetoxy group linked to the lactone pyran ring ( Almtorp et al, 1991 ). Later, a series of chemical studies carried out with Hyptis brevipes led to the identification of fifteen new α -pyrones named brevipolides A – F ( 171 – 176 ) ( Deng et al, 2009 ), G – J ( 177 – 180 ) ( Suárez-Ortiz et al, 2013 ) and K – O ( 181 – 185 ) ( Suárez-Ortiz et al, 2017 ). Additionally, the compounds named monticolides A ( 186 ) and B ( 187 ) were obtained from Hyptis monticola Mart.…”
Section: Phytochemistrymentioning
confidence: 99%
“…This compound is structurally similar to hypurticin ( 167 ) that presents an acetoxy group linked to the lactone pyran ring ( Almtorp et al, 1991 ). Later, a series of chemical studies carried out with Hyptis brevipes led to the identification of fifteen new α -pyrones named brevipolides A – F ( 171 – 176 ) ( Deng et al, 2009 ), G – J ( 177 – 180 ) ( Suárez-Ortiz et al, 2013 ) and K – O ( 181 – 185 ) ( Suárez-Ortiz et al, 2017 ). Additionally, the compounds named monticolides A ( 186 ) and B ( 187 ) were obtained from Hyptis monticola Mart.…”
Section: Phytochemistrymentioning
confidence: 99%
“…In 2016, Suárez-Ortiz et al [96] isolated and described the absolute configuration of five new compounds named brevipolides K−O from H. brevipes . Taking brevipolide M 36 (Figure 4) as an example, it contains a distinctive THF ring in the structure.…”
Section: Tetrahydrofuransmentioning
confidence: 99%
“…Hyptis brevipes Poit. is an invasive plant species belonging to the mint family Lamiaceae [1][2][3][4]. This plant has been reported to originate from tropical America but is now distributed broadly in other tropical areas of the world [1][2][3][4][5].…”
Section: Introductionmentioning
confidence: 99%