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A-Methylsuccinic acid

Heating the reaction for shorter periods gave erratic results. At this point the semisolid mixture can be diluted with 200 ml. of water, extracted with benzene, and the benzene extract fractionally distilled to give ethyl 2,3-dicyano-3-methylpentanoate, b.p. 146.0-147.5° (2.5 mm.), m27d 1.4429 (highly purified ester has b.p. 138.5-141.5° (2 mm.), 25d 1.4432). The overall yield of a-ethyl-a-methylsuccinic acid is decreased by about 5% when the dicyano intermediate is isolated. [Pg.31]

Butanone, conversion to a-ethyl-a-methylsuccinic acid, 44, 59 Butenolides from aryl aldehydes and y-keto adds, 43, 5 7-(-Butoxynorbornadifne, 44,12... [Pg.109]

Fichter446 has reported an arylazopyrazolinone as one of the products from the reaction of a,a -dibromo-a-methylsuccinic acid with p-bromophenylhydrazine (eq. 185). [Pg.89]

The alkaloid avadharidine differs from delsemine only in that it is a succinic acid derivative, whereas XXXIII is a methylsuccinic acid derivative. Acid cleavage of avadharidine produces anthranoyllycoctonine (XXX) thus, the structure of avadharidine is XXXVI. [Pg.18]

See other pages where A-Methylsuccinic acid is mentioned: [Pg.991]    [Pg.991]    [Pg.31]    [Pg.101]    [Pg.101]    [Pg.135]    [Pg.2250]    [Pg.2250]    [Pg.59]    [Pg.59]    [Pg.60]    [Pg.61]    [Pg.61]    [Pg.220]    [Pg.849]    [Pg.482]    [Pg.482]    [Pg.849]    [Pg.991]    [Pg.991]    [Pg.482]    [Pg.482]   
See also in sourсe #XX -- [ Pg.849 ]

See also in sourсe #XX -- [ Pg.849 ]



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