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Ethynyl tolyl sulfone

Ti( 72-propene)(OPr1)2 reacts with the two unsymmetrical acetylenes But02C-G=C-C6H13 and HC=C-G6H13 to give a dialkoxo-titanacyclopentadiene derivative (Scheme 99) which upon treatment with ethynyl tolyl sulfone produces a new single aryl-titanium compound.194... [Pg.360]

Cycloaddition of 7V-Boc-pyrrole with ethynyl / -tolyl sulfone generated the bicyclic system selective reduction of a double bond then conjugate addition of 5-lithio-2-methoxypyridine produced an intermediate, with the required stereochemistry, requiring only straightforward manipulations to produce epibatidine. [Pg.265]

Asymmetric 2-tosylvinylation of Af-substituted proline esters (207) using ethynyl tolyl sulfone as an electrophile has been shown to produce (208) at <95% ee in the absence of any added base. The reaction is believed to proceed via the formation of A-2-tosylvinyl ammonium ylides. ... [Pg.418]

The asymmetric a-2-tosylethenylation of (5)-2-(pyrrolidin-l-yl)propanoic acid esters using ethynyl tolyl sulfone as an electrophile produces a good yield with high enantioselectivity (up to 96% ee) without the addition of any bases The reaction would proceed via the formation of a nonracemic ammonium enolate without an external source of chirality. [Pg.310]

The ene reaction130 of ethynyl p-tolyl sulfone with alkenes has been investigated by Snider and coworkers131 using EtAlCl2 as a Lewis acid catalyst (equation 136). The reaction is very sluggish requiring 4 to 18 days at room temperature to obtain a reasonable... [Pg.808]

Other representative reactions are shown in Eqs. 9.14 and 9.15, which involve the synthesis of aromatic sulfones from an acetylene and 2 equivalents of ethynyl tolyl sul-... [Pg.329]

ETHYNYL p-TOLYL SULFONE (Benzene, 1 -(ethy ny 1 suit ony 1) -4-iaethy 1 -)... [Pg.149]

Ethynyl p-tolyl sulfone Sulfone, ethynyl p-tolyl (8) Benzene, l-(ethynylsulfonyl)-4-methyl- (9) (13894-21-8) p-Tolyl 2-(trimethylsilyl)ethynyl sulfone Silane, trimethyl [[(4-methylphenyl)sulfonyl]ethynyl]- (9) (34452-56-7)... [Pg.156]

DIENOPHILES Acrolein. Ethynyl p-tolyl sulfone. 3-Methylsulfonyl-2,5-dihydro-furane. 3-Nitro-2-cyclohexenone. Phenyl vinyl sulfone. [Pg.238]

Ethyl nitroacetate-Dicthyl azodicarboxyl-ate-Triphcnylphosphine, 182 Ethyl 2-phenylsulfinyIacetate, 183 Ethyl vinyl ether, 184 d-Ethynyl-0-propiolactone, 283 Ethynyl p-tolyl sulfone, 183 Ethynyltrimethylsilane, 177 Evodone, 231,232,279 Exaltone, 35... [Pg.262]

Ethynyl p-tolyl sulfone Sulfone, ethynyl p-tolyl (8) Benzene,... [Pg.79]

Treatment of bis(trimethylsilyl)acetylene with tosyl chloride and a slight excess of anydrous Aluminum Chloride affords p-tolyl (trimethylsilyl)ethynyl sulfone, a precursor to the reactive Miehael acceptor ethynyl p-tolyl sulfone (eq 38). ... [Pg.398]

Functionalized titanacydopentadienes such as 78, generated from two unsym-metrical acetylenes have been shown to react with ethynyl p-tolyl sulfone 79 to afford an aryltitanium compound 80 as shown in Scheme 12.54 [73aj. [Pg.529]

See other pages where Ethynyl tolyl sulfone is mentioned: [Pg.363]    [Pg.373]    [Pg.363]    [Pg.373]    [Pg.183]    [Pg.183]    [Pg.276]    [Pg.283]    [Pg.255]    [Pg.9]    [Pg.153]    [Pg.243]    [Pg.251]    [Pg.363]    [Pg.374]    [Pg.9]    [Pg.124]    [Pg.129]    [Pg.206]    [Pg.166]    [Pg.484]    [Pg.150]    [Pg.150]    [Pg.76]   
See also in sourсe #XX -- [ Pg.418 , Pg.506 ]



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Ethynyl p-tolyl sulfone

Ethynylation

Ethynyls

Sulfone, ethynyl p-tolyl Lewis acid catalysis

Sulfones ethynyl tolyl

Tolyl

Tolyl Sulfone

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