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Ylide synthesis

The synthesis of vitamin Dj from a sensitive dienone was another etu-ly success of phosphorus ylide synthesis (H.H. Inhoffen, 1958 A). This Wittig reaction could be carried out without any isomerization of the diene. An excess of the ylide was needed presumably because the alkoxides formed from the hydroxy group in the educt removed some of the ylide. [Pg.31]

Tetrazolium-5-thiolate, 2,3-diphenyl-structure, 5, 793 synthesis, 5, 827 Tetrazolium ylides synthesis, 5, 793, 827... [Pg.856]

The jS-oxido-ylides synthesis of trisubstituted olefins has also been applied to the synthesis of farnesol (127). The phosphonium salt (123) with the aldehyde (124) and formaldehyde gave the hydroxy farnesol derivative (125) which was transformed into farnesol (127) and into (126), a position isomer of Cj juvenile hormone. [Pg.170]

Photofragmentation of Oxiranes to Carbonyl Ylides Synthesis of Tetrahydrofiirans... [Pg.254]

Pandey, G., Laha, J.K., and Lakshmaiah, G. 2002. Stereoselective construction of X-azabicyclo[ i.2.1]alkanes by [3+2]-cycloaddition of non-stabilized cyclic azomethine ylides synthesis of enantiopure constrained amino acids and formal total synthesis of optically active epibatidine. Tetrahedron 58, 3525-3534. [Pg.137]

An alternative route to ylide synthesis via a-deprotonation is the abstraction of a proton from the y-po-sition of a vinylphosphonium salt (equation 10). Complications may arise, however, if the phosphonium salt carries a good leaving group in the P-position so that a vinylphosphonium salt may be formed, or if a P-proton is so acidic that a Hofmann elimination is favored. " ... [Pg.173]

Another ylide synthesis avoiding basic conditions starts from phosphonium fluorides. " Fluoride ions are basic enough to play the role of the usually added external base, giving rise to the formation of a phosphonium salt/ylide equilibrium (equation 16). [Pg.175]

Schlosser, M., Coffinet, D. a-SubstItutlon plus carbonyl olefinatlon via P-oxido phosphorus ylides (SCOOPY) reactions. Stereoselectivity of allyl alcohol synthesis via betaine ylides. Synthesis 1971, 380-381. [Pg.709]


See other pages where Ylide synthesis is mentioned: [Pg.170]    [Pg.181]   
See also in sourсe #XX -- [ Pg.6 ]

See also in sourсe #XX -- [ Pg.584 ]




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Alkali carbonates phosphonium ylide synthesis

Alkoxides phosphonium ylide synthesis

An Ylide-Based Synthesis of 4-Phenylisocoumarin

Arsenic ylides synthesis

Arsonium ylides synthesis

Asymmetric synthesis with sulfur ylides

Azomethine ylides, pyrrole synthesis

Carbonyl ylide, metal carbene synthesis

Carbonyl ylides directed syntheses

Carbonyl ylides enantioselective syntheses

Carbonyl ylides synthesis

Cyclopropanes synthesis using sulfur ylides

Dibenzophosphole ylides alkene synthesis

Erythramine synthesis via azomethine ylide cyclization

Ethylene oxide phosphonium ylide synthesis

Heterocyclic synthesis phosphorus ylides

Heterocyclic synthesis thiocarbonyl ylides

Locorenine synthesis via azomethine ylide cyclization

Nitrile ylides, synthesis

Nitrogen ylide cyclizations synthesis

Nitrogen ylides synthesis

Nucleophilic addition reactions phosphonium ylide synthesis

Phosphine oxides ylide synthesis

Phosphines phosphonium ylide synthesis

Phosphonium salts, 1,3,5-butatrienylphosphonium ylide synthesis

Phosphonium salts, 1,3-butadienylphosphonium ylide synthesis

Phosphonium salts, cyclopropyltriphenylphosphonium ylide synthesis

Phosphonium salts, tetraalkylphosphonium ylide synthesis

Phosphonium salts, vinylphosphonium ylide synthesis

Phosphonium ylides alkene synthesis

Phosphonium ylides synthesis

Phosphorane, iminovinylidenetriphenylphosphonium ylide synthesis

Phosphorane, iminovinylidenetriphenylphosphonium ylide synthesis cycloaddition

Phosphorane, iminovinylidenetriphenylphosphonium ylide synthesis reactions with alkyl halides

Phosphorane, oxovinylidenephosphonium ylide synthesis

Phosphorane, oxovinylidenephosphonium ylide synthesis reactions with acidic compounds

Phosphorane, vinylidenecycloaddition phosphonium ylide synthesis

Phosphorus ylides synthesis

Reaction with Sulfonium Ylides. Corey Synthesis

Reduction phosphonium ylide synthesis

Selected Applications of Ylides in Synthesis

Silylated phosphonium ylides synthesis

Sodium amide phosphonium ylide synthesis

Sodium hydride phosphonium ylide synthesis

Sulfonium ylides synthesis

Sulfur ylides synthesis

Synthesis and Characterisation of Phosphonium Ylides

Synthesis with sulfur ylides

Synthesis ylide formation

Ylide Nickel Complex Synthesis

Ylide compounds directed syntheses

Ylide compounds enantioselective syntheses

Ylide compounds heterocyclic synthesis

Ylide compounds ylides, heterocyclic synthesis

Ylide formation carbene synthesis, diazo compounds

Ylide-gold complexes synthesis

Ylides cyclopropane synthesis

Ylides synthesis

Ylides synthesis

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