Výsledky vyhledávání - "Ludovic Raffier"

Akademický článek

Application of the diastereoselective photodeconjugation of α,β-unsaturated esters to the synthesis of gymnastatin H

Publikováno v: Beilstein Journal of Organic Chemistry, Vol 7, Iss 1, Pp 151-155 (2011)

The asymmetric synthesis of gymnastatin H has been achieved by using the photoisomerisation of a conjugated ester to its β,γ-unsaturated isomer through the protonation of a in situ generated dienol as key step. Thanks to diacetone D-glucose used as

Externí odkaz: https://doaj.org/article/4c5101678cbf4bde88c9ecb050830dcc

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Formal enantioselective synthesis of nhatrangin A

Autor: Sophie Feuillastre, Ludovic Raffier, Olivier Piva, Béatrice Pelotier

Publikováno v: Organic & Biomolecular Chemistry. 18:1949-1956

A new and straightforward synthesis of the C1-C7 core fragment of nhatrangin A was achieved in 14 steps from achiral 3-hydroxybenzaldehyde, without the need of chiral reagents or enzymatic resolution to introduce the chiral centers. The key asymmetri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16d7e2635893ab942b6f56d7e757fc62
https://doi.org/10.1039/c9ob02639h

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Merging metathesis and photochemical Csp3-H activation: Access to masked β-formyl hexanolides and their rearrangement to furofuranones

Autor: Youssef Nassar, Olivier Piva, Ludovic Raffier, Sebastiaan Veys, Quentin Glenadel

Publikováno v: Tetrahedron
Tetrahedron, Elsevier, 2018, 74 (38), pp.5367-5373. ⟨10.1016/j.tet.2018.06.040⟩

β-Masked formyl hexanolides were prepared by a three-step sequence including esterification of homoallylic alcohols, ring-closing metathesis and the photochemically induced addition of dioxanyl radical. When treated under oxidative conditions, the a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a76d32be06e3010f65ae15fdde8bdf4e
https://doi.org/10.1016/j.tet.2018.06.040

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Alkenes as Chelating Groups in Diastereoselective Additions of Organometallics to Ketones

Autor: Patrick J. Walsh, Osvaldo Gutierrez, Marisa C. Kozlowski, Ludovic Raffier, Gretchen R. Stanton

Publikováno v: Organometallics

Alkenes have been discovered to be chelating groups to Zn(II), enforcing highly stereoselective additions of organozincs to β,γ-unsaturated ketones. 1H NMR studies and DFT calculations provide support for this surprising chelation mode. The results

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d10f5d8b4af939d0dcb147cd7aa1b3fa
https://doi.org/10.1021/om5007006

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Palladium-Catalyzed α-Arylation of Benzylic Phosphonates

Autor: Yuying He, Sonia Montel, Ludovic Raffier, Patrick J. Walsh

Publikováno v: Organic Letters

A new synthetic route to access diarylmethyl phosphonates is presented. The transformation enables the introduction of aromatic groups on benzylic phosphonates via a deprotonative cross-coupling process (DCCP). The Pd(OAc)2/CataCXium A-based catalyst

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff972205a652abb19329fd95bbe1fb7b
https://doi.org/10.1021/ol5002413

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Synthetic Studies on the Nhatrangins: Stereoselective Access to an Advanced Aldehyde Intermediate

Autor: Ludovic Raffier, Olivier Piva

Publikováno v: European Journal of Organic Chemistry. 2013:1124-1131

Two different strategies have been considered to achieve the first total synthesis of nhatrangins A and B. The first approach based on a cross metathesis (CM) reaction was unsuccessful. The second, which combined a highly stereoselective alkylation,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b398f8780409519e06b66b36298210b
https://doi.org/10.1002/ejoc.201201338

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Desymmetrization of Hepta-1,6-dien-4-ol by Prins Reaction and Subsequent Cross-Metathesis: Access to Diospongine A Homologues

Autor: Olivier Piva, Ludovic Raffier, Frédéric Izquierdo

Publikováno v: Synthesis. 2011:4037-4044

A new tetrahydropyran scaffold has been efficiently prepared by Prins reaction between hepta-1,6-dien-4-ol and benzaldehyde. Subsequent functionalizations were further achieved by Mitsunobu reaction and/or by the way of cross-metathesis/Wacker oxidat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fc34b49cf782bf23def528224ca7cf45
https://doi.org/10.1055/s-0031-1289588

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Application of the diastereoselective photodeconjugation of α,β-unsaturated esters to the synthesis of gymnastatin H

Autor: Olivier Piva, Ludovic Raffier

Publikováno v: Beilstein Journal of Organic Chemistry
Beilstein Journal of Organic Chemistry, Beilstein-Institut, 2011, 7, pp.151-5. ⟨10.3762/bjoc.7.21⟩
Beilstein Journal of Organic Chemistry, Vol 7, Iss 1, Pp 151-155 (2011)

International audience; The asymmetric synthesis of gymnastatin H has been achieved by using the photoisomerisation of a conjugated ester to its β,γ-unsaturated isomer through the protonation of a in situ generated dienol as key step. Thanks to dia

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b954acac7568a393713cc2657741bc4f
https://doi.org/10.3762/bjoc.7.21

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ChemInform Abstract: Palladium-Catalyzed α-Arylation of Benzylic Phosphonates

Autor: Patrick J. Walsh, Sonia Montel, Yuying He, Ludovic Raffier

Publikováno v: ChemInform. 45

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ac9e846bf0009900b397e6bc8678630d
https://doi.org/10.1002/chin.201433199

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