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Malkov AV, Farn BP, Hussain N, Kočovský P. Molybdenum-Catalyzed Allylic Substitution in Glycals: A C-C Bond-Forming Ferrier-Type Reaction. ACTA ACUST UNITED AC 2001. [DOI: 10.1135/cccc20011735] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The mild, Lewis-acidic complexes [Mo(CO)4Br2]2, (MeCN)2Mo(CO)3(SnCl3)Cl, and (acac)2Mo(OTf)2 have been found to catalyze the C(1)-specific C-glycosylation reaction of glycal acetates 1-3 with silyl enol ethers 4a-4c and electron-rich aromatics 5a, 5b (PhOMe, PhOH). While silyl enol ethers produce predominantly α-C-glycopyranosides (with 2 : 1 to 4 : 1 selectivity), aromatics tend to afford mainly β-C-glycopyranosides (2 : 1 to 3 : 1) in a thermodynamically controlled process.
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de Raadt A, Ferrier RJ. Syntheses and reactions of saturated and 2,3-unsaturated vinyl and 1′-substituted-vinyl glycosides. Carbohydr Res 1992. [DOI: 10.1016/0008-6215(92)84153-j] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Geilen CC, Loch N, Reutter W, Seppelt K, Oberdorfer F. A simple synthesis of 2-deoxy-2-fluoro-d-galactose using xenon difluoride. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)92208-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mitsunobu O, Yoshida M, Takiya M, Kubo K, Maruyama S, Satoh I, Iwami H. Regioselective Methylation of the C-1 and C-3 Positions of 1,5-Anhydro-4,6-O-benzylidene-2-deoxy-3-O-mesyl-D-ribo-hex-1-enitol by the Reaction with Methylmagnesium Bromide or Methyl Cuprates. CHEM LETT 1989. [DOI: 10.1246/cl.1989.809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ogihara T, Mitsunobu O. Reaction of 4,6-0-benzylidene-3-0-mesyl-allal with allylic grignard reagents. Highly regio- and stereoselective preparation of 2,6-disubstituted dihydropyran rings. Tetrahedron Lett 1983. [DOI: 10.1016/s0040-4039(00)86024-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Korytnyk W, Valentekovic-Horvath S, Petrie C. A convenient synthesis of 1,2-difluoro-1, 2-dideoxyhexoses using xenon fluoride. Tetrahedron 1982. [DOI: 10.1016/0040-4020(82)85090-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jarglis P, Lichtenthaler FW. Boron trifluoride-catalyzed oxidation of glycal esters: An effective and mild method for their conversion into α,β-unsaturated lactones. Tetrahedron Lett 1982. [DOI: 10.1016/s0040-4039(00)87705-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Priebe W, Zamojski A. The acid-catalysed reaction of thiols with alkyl 2,3-dideoxy-glyc-2-enopyranosides or glycals. Tetrahedron 1980. [DOI: 10.1016/0040-4020(80)80017-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Heyns K, Feldmann J, Heyns K, Feldmann J. Chemische Reaktionen und Derivatisierungen ungesättigter Zucker. STARCH-STARKE 1980. [DOI: 10.1002/star.19800320203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Grynkiewicz G, Priebe W, Zamojski A. Synthesis of alkyl 4,6-di-o-acetyl-2,3-dideoxy-α-d-threo-hex-2- enopyranosides from 3,4,6-tri-o-acetyl-1,5-anhydro-2-deoxy- d-lyxo-hex-1-enitol (3,4,6-tri-o-acetyl-d-galactal). Carbohydr Res 1979. [DOI: 10.1016/s0008-6215(00)84052-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Einfache de-novo-Synthese reaktiver Pseudoglykale (Hex-2-enopyranoside) – stereospezifische α-Glykosid-verknüpfung. Angew Chem Int Ed Engl 1977. [DOI: 10.1002/ange.19770891115] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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