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Maleimide reaction

Reaction of 3-amino-4-imino-47/-pyrido[l,2- ]pyrazines 319 with DMAD and maleimides 321 yielded 2,2 -bipyr-idine-3,4-dicarboxylates 320, and mixtures of bi- and tricyclic derivatives 322 and 323, respectively (Scheme 27) <1996JPR430>. In the cases of maleimide reactions, higher temperature (at 160°C in xylene) in an autoclave gave only 323. When pyrido[l,2- ]pyrazine 319 (Ar = 4-MeC6H4) was reacted with W-(4-methylphenyl)-maleimide 321 (R = 4-MeC6H4), 324 could be isolated. [Pg.140]

Preparation of Hapten-Carrier Immunogen Conjugates Maleimide Reaction Rate... [Pg.444]

Azizian et al. [103] described a novel four-component reaction for the diastereo-selective synthesis of spiro-pyrrolizidines 170 using a 1,3-dipolar cycloaddition of azomethine ylides to N-aryl maleimides. Reaction of ninhydrin 166 with 1,2-phenylenediamine 167 in DMSO, and addition of L-proline 168 and N-aryl maleimides 169 in a one-pot four-component reaction (Scheme 11.41) usually required extended reaction times of up to 3 h at 100 °C to obtain the desired spiro-pyrrolizidines 170 in 76-86% yield as single diastereoisomers. This process can be accelerated substantially (3-5 min) with good yields (87-95%) by performing the reaction under microwave irradiation conditions. [Pg.558]


See other pages where Maleimide reaction is mentioned: [Pg.160]    [Pg.183]    [Pg.521]    [Pg.150]    [Pg.168]    [Pg.406]    [Pg.464]    [Pg.924]    [Pg.130]    [Pg.148]    [Pg.386]    [Pg.174]    [Pg.137]    [Pg.117]    [Pg.865]    [Pg.137]    [Pg.130]    [Pg.436]    [Pg.273]   
See also in sourсe #XX -- [ Pg.183 ]




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Diels-Alder reactions of maleimide

Maleimide Diels-Alder reaction with

Maleimide Diels-Alder reactions

Maleimides

Maleimides Diels-Alder reaction

Maleimides Michael reactions

Reaction benzophenone-4-maleimide

Reaction maleimides

Reaction maleimides

Thiol-maleimide addition reaction

Thiol-maleimide reaction

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