• 제목/요약/키워드: Acetals

검색결과 32건 처리시간 0.023초

Indium(III) Chloride Mediated Michael Addition of Indoles to Ketene S,S-Acetals: Synthesis of Bis- and Tris-indolylketones

  • Singh, Thokchom Prasanta;Khan, Ruhima;Noh, Young Ri;Lee, Sang-Gyeong;Singh, Okram Mukherjee
    • Bulletin of the Korean Chemical Society
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    • 제35권10호
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    • pp.2950-2954
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    • 2014

  • A series of bis and tris-indolylketones and meridianin alkaloids are prepared by one pot Michael reaction of indole and ketene S,S-acetals under solvent-free condition using mild Lewis acid $InCl_3$.

  • https://doi.org/10.5012/bkcs.2014.35.10.2950 인용 PDF KSCI KPUBS HTML

Stereocontrolled Preparation of 2,6-Disubstituted 4-Methylenetetrahydropyrans by Lewis Acid Promoted Allylsilane-Acetal Cyclization

  • 성태명;곽우영;강경태
    • Bulletin of the Korean Chemical Society
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    • 제19권8호
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    • pp.862-868
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    • 1998

  • The Lewis acid mediated intramolecular additions of allylsilanes to acetal substrates are described. Excellent regio- and diastereoselectivity are achieved by boron trifluoride promoted cyclization of allysilane-acetals 5 and 8 derived from hydroxy allysilances 3. Cyclizations occur in moderate to high yields, providing directr routes to cis-2, 6-disubstituted 4-methylenetetrahydropyrans 6 and 9.

  • https://doi.org/10.5012/bkcs.1998.19.8.862 인용 PDF

Reaction Phosphite with Acetal Derivatives:Syntheses of 1-Alkoxymethylphosphonates and 1-Alkylthiomethylphosphonates

  • 김대영;한동일;오동영
    • Bulletin of the Korean Chemical Society
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    • 제19권2호
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    • pp.226-230
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    • 1998

  • 1-Alkoxymethylphosphonates 4 and 1-alkylthiomethylphosphonates 5 can be prepared by the reaction of actal derivatives and diethyl trimethylsilyl phosphite in the presence of Lewis acid under mild conditions. The dependency of the chemoselectivities with Lewis acid on the reaction of O,S-acetals with phosphites is described.

  • https://doi.org/10.5012/bkcs.1998.19.2.226 인용 PDF