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Cyclobutene-1,2-dione 3,4-dimethyl

Finally, a reaction should be mentioned in which a nucleophile gives support to another reacting species without appearing in the final product. Diphenyl cyclopropenone interacts with 2,6-dimethyl phenyl isocyanide only in the presence of tri-phenylphosphine with expansion of the three-ring to the imine 344 of cyclobutene-dione-1,2229,230 Addition of the isocyanide is preceded by formation of the ketene phosphorane 343, which can be isolated in pure formss 231 it is decomposed by methanol to triphenyl phosphine and the ester 52. [Pg.78]

DIMETHYL SQUARATE AND ITS CONVERSION TO 3-ETHENYL-4-METHOXYCYCLOBUTENE-1,2-DIONE AND 2-BUTYL-6-ETHENYL-5-M ETHOXY-1,4-BENZOQUINONE (3-Cyclobutene-1,2-dione, 3-ethenyl-4-methoxy- and 2,5-cyclohexadiene-1,4-dione, 5-butyl-3-ethenyl-2-methoxy- from 3-cyclobutene-1,2-dione, 3,4-dimethoxy-)... [Pg.189]

Dimethyl squarate Cyclobutenedione, dimethoxy- (8) 3-Cyclobutene-1,2-dione, 3,4-dimethoxy- (9) (5222-73-1)... [Pg.198]

See other pages where Cyclobutene-1,2-dione 3,4-dimethyl is mentioned: [Pg.250]    [Pg.159]    [Pg.1044]    [Pg.144]    [Pg.322]    [Pg.322]    [Pg.162]    [Pg.31]    [Pg.252]   
See also in sourсe #XX -- [ Pg.54 ]



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1.3- Dimethyl-6- diones

Cyclobutene

Cyclobutene 3.3- dimethyl

Cyclobutene-1,2-dione

Cyclobutenes

DIMETHYL SQUARATE: 3-CYCLOBUTENE-1,2-DIONE, 3,4-DIMETHOXY

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