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Organolithium reagents, addition exchange

Several examples of intramolecular additions to carbonyl groups by organolithium reagents generated by halogen-metal exchange have been reported, such as the examples shown below. What relative reactivity relationships must hold in order for... [Pg.472]

Organolithium reagents undergo addition to the 7t-bond of cyclopropenes, but the reaction competes with lithium-hydrogen exchange at the vinylic position and rearrangement to a methylenecyclopropane by removal of an allylic exocyclic hydrogen. [Pg.125]

It is worth mentioning that the substituted cyclohexanone was also formed from the iodocyanopentane when lithiated with n-butyllithium in diethyl ether. The halogen exchange reaction is obviously much faster than nitrile addition for the organolithium reagent (see also the reaction mentioned on p.96. [Pg.86]

See other pages where Organolithium reagents, addition exchange is mentioned: [Pg.110]    [Pg.386]    [Pg.89]    [Pg.650]    [Pg.129]    [Pg.129]    [Pg.927]    [Pg.13]    [Pg.61]    [Pg.647]    [Pg.136]    [Pg.871]    [Pg.13]    [Pg.386]    [Pg.110]    [Pg.252]    [Pg.12]    [Pg.1377]    [Pg.181]    [Pg.61]    [Pg.1377]    [Pg.129]    [Pg.912]    [Pg.1115]    [Pg.1301]    [Pg.419]    [Pg.8]    [Pg.34]    [Pg.155]    [Pg.156]    [Pg.375]    [Pg.91]    [Pg.132]    [Pg.174]    [Pg.13]    [Pg.134]    [Pg.135]    [Pg.62]    [Pg.609]    [Pg.614]    [Pg.623]    [Pg.629]    [Pg.529]    [Pg.44]    [Pg.1005]    [Pg.317]   
See also in sourсe #XX -- [ Pg.595 ]



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