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O-Halogenoketones

S-benzylideneamino deiivatives of, 288 o-Aminolstones, synthesis of, from a-halogenoketones, 282 by reduction of ornitrosoketones, 282 S-Amino-2-meicaptothiazoles, benzylidene-amino derivatives of, 287 from carbon disulfide and o ammonitiiles, 286... [Pg.303]

Conflicting reports relating to the products obtained from the Tiffeneau-Demjanov ring-expansion of 5a-cholestan-3-one have appeared. G.Lc. analysis has failed to reveal the presence of the A-homo-3-ketone, although it has been detected by o.r.d. and c.d. measurements. The pure A-homo-4-ketone has now been obtained via solvolysis of the dibromocarbene adduct (309) of 3-methoxy-cholest-2-ene to afford the unsaturated halogenoketone (310) which was then reduced to the 4-one. In a similar manner, 3-acetoxycholest-3-ene afforded the isomeric unsaturated halogenoketone (311) which on reduction produced A-homo-5a-cholestan-3-one. [Pg.449]

Boron fluoride I lithium iodide Ketones from a-halogenoketones 71. O... [Pg.35]

Cuprous cyanide 2-Cyano-O-heterocyclics from halogenoketones... [Pg.516]

See other pages where O-Halogenoketones is mentioned: [Pg.297]    [Pg.269]    [Pg.417]    [Pg.257]    [Pg.297]    [Pg.269]    [Pg.417]    [Pg.257]    [Pg.117]    [Pg.191]    [Pg.409]    [Pg.215]    [Pg.207]    [Pg.207]    [Pg.252]    [Pg.409]    [Pg.260]    [Pg.255]    [Pg.242]    [Pg.249]    [Pg.15]   


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Halogenoketones

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