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Reformatsky reaction vinylogous

When 191a was used in a vinylogous Reformatsky reaction with the 3-ulose derivative 192 in refluxing ether, a 2 1 a/ adduct ratio was obtained (equation 99). The facial selectivity ensured by the rigid bicyclic framework of 192 was accompanied by a complete simple diastereoselectivity in the formation of the a-adduct193. [Pg.849]

In conclusion, the regiochemical outcome of a vinylogous Reformatsky reaction can be modified by checking the following variables (i) the way the enolate is produced, (ii) the solvent, (iii) the temperature and (iv) the reaction time, if equilibration is supposed to be in action. [Pg.854]

The Reformatsky reaction is very similar to 16-24. An aldehyde or ketone is treated with zinc and a hahde the hahde is usually an a-halo ester or a vinylog of... [Pg.1326]

Auxiliary-Based Aldol, Vinylogous Aldol, and Reformatsky Reactions 147... [Pg.147]

Catalytic, Enantloselective Aldol, VInylogous Aldol, and Reformatsky Reactions 315... [Pg.315]

Catalytic, Enantioselective Aldol, Vinylogous Atdot, and Reformatsky Reactions 317... [Pg.317]

See other pages where Reformatsky reaction vinylogous is mentioned: [Pg.1212]    [Pg.239]    [Pg.240]    [Pg.930]    [Pg.288]    [Pg.34]    [Pg.62]    [Pg.2315]   
See also in sourсe #XX -- [ Pg.839 , Pg.850 , Pg.854 ]



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