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Freund reaction

The Freund reaction of 3,4-dimethylpyridine methobromide and benzylmagnesium bromide affords a mixture of two isomeric di-hydropyridines (46a, b). The partial reduction of the latter isomer to l,3,4-trimethyl-6-benzyl-3-piperideine (47) was performed by hydrogenation (Pd/BaS04), or by the action of sodium borohydride, or on treatment of the perchlorate with lithium aluminum hydride.39... [Pg.57]

Other references related to the Freund reaction are cited in the literature. ... [Pg.1125]

Forster Diazoketone Synthesis Forster Reaction Four-Component Condensation Franchimont Reaction Frankland Synthesis Frankland-Duppa Reaction Freund Reaction... [Pg.6]

Freund Reaction Gustavson Reaction Hass Cyclopropane Process... [Pg.284]

Formation of al icy die hydrocarbons by the action of sodium (Freund reaction) or zinc (Gustavson reaction) on open chain dihalo compounds 1,3-dichloropropane derived from the chlorination of propane obtained from natural gas is cyclized in the Hass cyclopropane process by treating with zinc dust in aqueous alcohol in the presence of catalytic sodium iodide ... [Pg.284]

The Freund reaction refers to the formation of alicyclic hydrocarbons by the reaction of sodium on open chain dihalo compounds. ... [Pg.2]

The mechanism of Freund reaction is more likely as same as the Wurtz reaction, a free-radical mechanism. In the presence of iodide ions, the pathways might be a combination of substitution (SnI or Sn2) with a free-radical mechanism. ... [Pg.2]

See other pages where Freund reaction is mentioned: [Pg.88]    [Pg.58]    [Pg.459]    [Pg.703]    [Pg.326]    [Pg.1123]    [Pg.1123]    [Pg.1124]    [Pg.661]    [Pg.284]    [Pg.1]    [Pg.2]    [Pg.2]    [Pg.4]    [Pg.762]    [Pg.814]    [Pg.682]   


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Freund

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