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Methyl cyclobutenecarboxylate

In the presence of magnesium bromide, cyclobutenecarbonitrile reacted with 1-morpholino-cy-cloalkenes to give exclusively the cycloadducts 23. Rather surprisingly, only cyclobutyl ketones 24 were obtained when cyclobutenecarbonitrile or methyl cyclobutenecarboxylate was reacted with other enamines under similar conditions.30... [Pg.37]

The sesquiterpenoids (228)—(234), previously isolated from Heterotheca species, have all been synthesized.121 Further work on the photoadduct (235) derived from methyl cyclobutenecarboxylate and (—)-piperitone has demonstrated the important synthetic utility of this compound.122 Flash vacuum pyrolysis of (235) at 500 °C gives (236)—(240). Additional thermolysis experiments showed that (237) and (238) are the precursors of (236) and that this compound undergoes a further... [Pg.107]

Thermolysis of the [2 + 2] photoadducts of methyl cyclobutenecarboxylate (148) and cycloalkenes appears to be a useful method of preparing medium-sized carbo-cycles (Scheme 33), and the divinylcyclopropane systems (149 n = 1—3) undergo... [Pg.224]

See other pages where Methyl cyclobutenecarboxylate is mentioned: [Pg.140]    [Pg.263]    [Pg.136]    [Pg.477]    [Pg.477]    [Pg.140]    [Pg.263]    [Pg.136]    [Pg.477]    [Pg.477]    [Pg.553]    [Pg.905]    [Pg.553]   
See also in sourсe #XX -- [ Pg.306 ]

See also in sourсe #XX -- [ Pg.263 ]

See also in sourсe #XX -- [ Pg.336 ]



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