65408-91-5Relevant academic research and scientific papers
Synthesis of (+)-altholactone, (+)-7-epi-altholactone, (?)-etharvensin, and (+)-alumheptolide-A using Pd-catalyzed carbonylation
Miyazawa, Yuki,Hattori, Yasunao,Makabe, Hidefumi
, p. 4024 - 4027 (2018/10/05)
Syntheses of (+)-altholactone isolated from Goniothalamus giganteus and its C-7 epimer (+)-7-epi-altholactone, (?)-etharvensin and (+)-alumheptolide-A were achieved. The lactone ring of these compounds was constructed using Pd-catalyzed carbonylation.
The first total synthesis of (+)-goniothalesacetate and syntheses of (+)-altholactone, (+)-gonioheptolide A, and (-)-goniofupyrone by an asymmetric acetate aldol approach
Ankireddy, Sandeep,Ankireddy, Praveen,Sabitha, Gowravaram
, p. 10487 - 10495 (2015/11/10)
The first stereoselective total synthesis of (+)-goniothalesacetate and total synthesis of several bioactive styryl lactones, (+)-altholactone, (+)-gonioheptolide A, and (-)-goniofupyrone have been achieved from an advanced intermediate, which can be derived from l-(+)-DET.
Stereospecificity in the Au-catalysed cyclisation of monoallylic diols. Synthesis of (+)-isoaltholactone
Unsworth, William P.,Stevens, Kiri,Lamont, Scott G.,Robertson, Jeremy
supporting information; experimental part, p. 7659 - 7661 (2011/09/12)
We describe a concise synthesis of (+)-isoaltholactone via a Au-catalysed cyclisation of a monoallylic diol to form the tetrahydrofuranyl ring. Analogous cyclisations show that the stereochemical outcome is dictated by the stereochemistry of the diol substrate.
Apoptotic activities in closely related styryllactone stereoisomers toward human tumor cell lines: Investigation of synergism of styryllactone-induced apoptosis with TRAIL
Gupta, Shuchi,Poeppelman, Lee,Hinman, Channing. L.,Bretz, James,Hudson, Richard A.,Tillekeratne, L.M. Viranga
experimental part, p. 849 - 854 (2010/05/18)
A related series of styryllactones with small functional and stereochemical variations were compiled for a comparative study of their apoptotic activities toward two tumorigenic and one non-tumorigenic control cell line. While a substantial range of intrinsic activity was observed, the relative order of activity of the different compounds toward the cell types varied somewhat as did the relative ratios of apoptosis and necrosis observed in conjunction with the loss of cell viability. While some of the styryllactones showed substantial activity, a small but significant apoptosis-induced synergism was demonstrated with (-)-altholactone and TRAIL (tumor necrosis factor-related apoptosis-inducing ligand).
Asymmetric synthesis of (+)-altholactone: A styryllactone isolated from various goniothalamus species
Enders, Dieter,Barbion, Julien
experimental part, p. 2842 - 2849 (2009/04/07)
The asymmetric total synthesis of (+)-altholactone (1), a member of the styryllactone family of natural products displaying cytotoxic and antitumor activities, is described. Key steps include a RAMP-hydrazone a-alkylation (RAMP = (R)-1-amino-2-methoxymethylpyrrolidine) of 2,2-dimethyl-1,3-dioxan-5-one, a boron-mediated aldol reaction, a six- to five-membered ring acetonide shuffling, an oxidative 1,5-diol to δ-lactone conversion and a stereoselective ring-closure to generate the annulated tetrahydrofuran moiety with inversion of configuration.
Stereoselective synthesis of (+)-goniodiol, (+)-goniotriol, (-)-goniofupyrone, and (+)-altholactone using a catalytic asymmetric hetero-Diels-Alder/allylboration approach
Favre, Annaick,Carreaux, Francois,Deligny, Michael,Carboni, Bertrand
experimental part, p. 4900 - 4907 (2009/06/06)
The stereoselective total synthesis of several members of the styryllactone family was achieved efficiently from common intermediate 8, prepared by a catalytic asymmetric inverse-electron-demand hetero-Diels-Alder/allylboration sequence. The transformatio
Highly stereoselective synthesis of antitumor agents: Both enantiomers of goniothales diol, altholactone, and isoaltholactone
Yadav, Jhillu Singh,Raju, Atcha Krishnam,Rao, Ponugoti Purushothama,Rajaiah, Gurram
, p. 3283 - 3290 (2007/10/03)
A flexible stereoselective route to synthesize both enantiomers of the highly functionalized substituted tetrahydrofurans and α,β- unsaturated-δ-lactones, goniothales diol, altholactone, and isoaltholactone, from readily available cinnamyl alcohol is described. This approach derived its asymmetry from Sharpless catalytic asymmetric epoxidation and Sharpless asymmetric dihydroxylation reactions. The resulting diols were produced in high enantiomeric excess and were cyclized in a stereoselective manner in the presence of a catalytic amount of camphor sulfonic acid.
A concise and stereoselective synthesis of both enantiomers of altholactone and isoaltholactone
Yadav,Rajaiah,Raju, A. Krishnam
, p. 5831 - 5833 (2007/10/03)
A concise and flexible stereoselective route to synthesize both enantiomers of the highly functionalized α,β-unsaturated-δ-lactones, altholactone and isoaltholactone, from readily available cinnamyl alcohol is described. This approach derived its asymmetry from Sharpless catalytic asymmetric epoxidation and Sharpless asymmetric dihydroxylation reactions. The resulting diols were produced in high enantiomeric excess and were cyclized in a stereoselective manner in the presence of a catalytic amount of camphor sulphonic acid.
Enantioselective total synthesis of (+)-isoaltholactone
Peng, Xiaoshui,Li, Anpai,Lu, Jiangping,Wang, Qiaoling,Pan, Xinfu,Chan, Albert S.C
, p. 6799 - 6804 (2007/10/03)
A facile enantioselective route to highly functionalized α,β-unsaturated -δ-lactones has allowed for the synthesis of (+)-isoaltholactone in 6.4% overall yield from furylmethanol. This approach derived its asymmetry by applying Sharpless kinetic resolution on racemic 2-furylmethanol. The resulting pyranone was produced in high enantioexcess and was stereoselectively transformed into (+)-isoaltholactone via a highly diastereoselective epoxidation and a key PPTS catalyzed intramolecular cyclization.
An olefination approach to the enantioselective syntheses of several styryllactones
Harris, Joel M,O'Doherty, George A
, p. 5161 - 5171 (2007/10/03)
A flexible enantioselective route to highly functionalized α,β-unsaturated δ-lactones, has allowed for the syntheses of the styryllactones: altholactone, isoaltholactone, 3-epi-altholactone, 2-epi-altholactone and 5-hydroxy goniothalamin in 2.5, 10, 5, 1 and 13% overall yields from furfural, respectively. This approach derives its asymmetry by applying the Sharpless catalytic asymmetric dihydroxylation to vinylfuran. The resulting diols are produced in high enantioexcess and can be stereoselectively transformed into α,β-unsaturated-δ-lactones via a short highly diastereoselective oxidation and reduction sequence. Wittig olefination or Julia olefination reactions were used to introduce the phenyl group side chain either cis or trans selectively and these intermediates were further elaborated into the altholactone isomers via selective epoxidation reactions.
