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Carbolithiation-intramolecular alkylation

Carbocyclization of m-alkcnyl-z-methoxybcnzy I lithiums to form five- or six-membered rings has been studied 101 the five-membered ring is formed with a cis-stereochemical relationship between the methoxy substituent and the adjacent methyl group. Intramolecular carbolithiation of vinyl sulfides at — 105°C in THF has been found to occur non-stereospecifically with regard to the newly formed C—Li centre.102. The stereochemistry of selective tandem Michael addition alkylation reactions of vinylphosphonates has been explored.103... [Pg.342]

More recently, asymmetric intramolecular carbolithiation was described, either with a remote chiral center in a suitable position to promote a diastereofacial differentiation of the olefin [130] or with a chiral organolithium derivative [131]. In the former case, alkylation... [Pg.444]

See other pages where Carbolithiation-intramolecular alkylation is mentioned: [Pg.436]    [Pg.309]    [Pg.436]    [Pg.309]    [Pg.3]    [Pg.297]    [Pg.313]    [Pg.316]    [Pg.329]    [Pg.333]    [Pg.350]    [Pg.807]    [Pg.13]    [Pg.27]   
See also in sourсe #XX -- [ Pg.309 ]

See also in sourсe #XX -- [ Pg.309 ]



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Alkylation intramolecular

Carbolithiation intramolecular

Carbolithiations

Intramolecular alkylations

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