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Cytotoxic activity of cis-(E)- and trans-(Z)-spiroethers isolated from various Arnebia species

Autor: Masoumeh Mehmandoust, Majid Azizi, Gholamreza Karimi, Seyedeh Faezeh Taghizadeh, Ramin Rezaee, Javad Asili, Fatemeh Sadat Madarshahi

Publikováno v: South African Journal of Botany. 142:114-123

Spiroethers comprise a sub-class of spirocycles and exert various biological properties such as antibacterial and anti-tumor activities. The present study investigated the total spiroether isomers present in methanolic extract of root and aerial part

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::674abcfb0b7048384bcfb3e0b17c51d3
https://doi.org/10.1016/j.sajb.2021.06.011

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Diastereoselective Synthesis of Spirocyclic Ether from ortho ‐Carbonylarylacetylenols via Silver‐Catalyzed Cyclization under Acidic Conditions

Autor: Somsak Ruchirawat, Bundet Boekfa, Kittipong Chainok, Charnsak Thongsornkleeb, Kanokwan Jaithum, Jumreang Tummatorn

Publikováno v: Advanced Synthesis & Catalysis. 363:3812-3834

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ed969c48b1ca9cb4ae44163a01765e3
https://doi.org/10.1002/adsc.202100548

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Akademický článek

Diastereoselective Synthesis of 5-Hydroxy-8-methoxy-1-oxaspiro[5,5]undeca-7,10-diene-9-one

Autor: Thomas W. Scully, Guy L. Plourde

Publikováno v: Molecules, Vol 18, Iss 1, Pp 1174-1180 (2013)

A short five steps synthesis of the title compound from vanillin is described. The racemic spiroether 7 was obtained in 61% yield and in >99% diastereomeric excess (by 1H-NMR) from the corresponding phenolic derivative 3 by oxidation with lead (IV) a

Externí odkaz: https://doaj.org/article/3f9fd25bb54244deabec0da9b5624a6b

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Akademický článek

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Straightforward synthesis of novel spiroether derivatives

Autor: V. L. Gein, Olga V. Bobrovskaya, Aleksandr A. Russkih, A. N. Yankin, Maksim V. Dmitriev, Aleksandr S. Bunev

We report the first full synthesis of novel spiroether derivatives via reaction of 4-oxobut-2-enoates and alloxan. Our synthesis features the single-step assembly, mild reaction conditions, good yields, high diastereoselectivity, operational simplici

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::805e7084ed15d726365ec01df1ca0324

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Akademický článek

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A Convergent Approach to Diverse Spiroethers through Stereoselective Trapping of Rhodium Carbenoids with Gold-Activated Alkynols

Autor: Joseph C. Stevens, Indrajeet Sharma, Arianne C. Hunter, Bilal Almutwalli, Steven C. Schlitzer

Publikováno v: The Journal of organic chemistry. 83(5)

A convergent approach for the stereoselective synthesis of diverse spiroethers is described. The reaction involves stereoselective trapping of diazo-derived rhodium carbenoids with gold-activated alkynols for the installation of spiro cores. The reac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bc2aec8673a142900a6a94dbf9b805a
https://pubmed.ncbi.nlm.nih.gov/29384670

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Diastereoselective Synthesis of 5-Hydroxy-8-methoxy-1-oxaspiro[5,5]undeca-7,10-diene-9-one

Autor: Guy L. Plourde, Thomas W. Scully

Publikováno v: Molecules
Volume 18
Issue 1
Pages 1174-1180
Molecules, Vol 18, Iss 1, Pp 1174-1180 (2013)

A short five steps synthesis of the title compound from vanillin is described. The racemic spiroether 7 was obtained in 61% yield and in >
99% diastereomeric excess (by 1H-NMR) from the corresponding phenolic derivative 3 by oxidation with lea

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::abec7f60ab0b3135a9832d7b340b09dc
https://doi.org/10.3390/molecules18011174

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Asymmetric Synthesis of Spiroketal, Spiroether, and Oxabicycle Building Blocks via Stereoselective Spiro- and Bicycloannulation of 2-Hydroxy Dihydropyrans

Autor: Hans-Joachim Gais, Jan Runsink, Michal Lejkowski, Prabal Banerjee

Publikováno v: Organic Letters. 10:2713-2716

A modular asymmetric synthesis of spiroketal, spiroether, and oxabicycle building blocks is described based on the spiro- and bicycloannulation of alpha-hydroxy dihydropyrans, which were obtained from sulfoximine-substituted homoallylic alcohols. Key

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80742ba02a2a1ee5ceb8b545548699cb
https://doi.org/10.1021/ol800854s

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Diastereoselective Spiroannulation of Phenolic Substrates: Synthesis of (Ã‚Â±)-2-tert-Butyl-6-methoxy-1-oxaspiro[4,5]deca-6,9-diene-8-one

Autor: Guy L. Plourde, Nadine J English

Publikováno v: Molecules, Vol 10, Iss 10, Pp 1335-1339 (2005)
Molecules
Volume 10
Issue 10
Pages 1335-1339
Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry

The synthesis of a new spiroether is described. The title compound is obtained as a diastereomeric mixture in 45% yield.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78f72fdd49a6e38a81cee4dad44f82ef
http://www.mdpi.com/1420-3049/10/10/1335/

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