Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Anf/ -Markovnikov addition

Formation of a trialkylborane by anf/ -Markovnikov addition, and its conversion to an alcohol using alkaline hydrogen peroxide, and amines using hydroxylaminesulfonic acid. [Pg.33]

HBr, ROOR Hydrobromination When treated with HBr in the presence of peroxides, an alkene rmdergoes anf/-Markovnikov addition of H and Br. [Pg.342]

Now, let s draw the forward scheme. In the presence of peroxides, the reaction of 1-pentene with HBr produces 1-bromopentane (via anfe -Markovnikov addition). Subsequent reaction with acetylide [produced from ethylene as shown by bromination (Br2), double elimination and deprotonation (excess NaNH2)] provides 1-heptyne. Reduction to the alkene (H2 / Lindlar s catalyst) followed by anP-Markovnikov addition (HBr / peroxide) yields 1-bromoheptane. This primary alkyl bromide can then undergo an Sn2 reaction when treated with acetylide (prepared above), giving the... [Pg.396]

Bromohexane is made by anfe -Markovnikov addition of HBr to 1-hexene. [Pg.451]

Under radical conditions, thiols add to terminal alkynes to give the corresponding anf/-Markovnikov addition products 3 regioselectively in good yields. In this... [Pg.340]

See other pages where Anf/ -Markovnikov addition is mentioned: [Pg.247]    [Pg.203]    [Pg.204]    [Pg.206]    [Pg.208]    [Pg.395]    [Pg.216]    [Pg.247]    [Pg.203]    [Pg.204]    [Pg.206]    [Pg.208]    [Pg.395]    [Pg.216]   


SEARCH



Markovnikov addition

© 2024 chempedia.info