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3- Isobutyl-3,6-dihydro-2.5 pyrazinedione

Again, only one example of this synthesis has been reported. Like the analogous substrate (140), isobutyl 1,1 -dimethyl-5,8-dioxo-1,5,6,7,8,8a-hexahydro-3//-thia-/oIo13,4-a pyrazine-3-carboxyIic acid (142) underwent hssion and desulfurization (on stirring with ethanolic Raney nickel at 20°C for 12 h) to afford an hydropy-razine, this time l-isobutoxycarbonylmethyl-6-isopropyl-3,6-dihydro-2,5(l//, 4H)-pyrazinedione (143) in 89% yield.1255... [Pg.69]

In a similar manner, 3-isobutyl-6-methyl-3,6-dihydro-2,5(l//,4//)-pyrazinedione (9, R = Me) gave 2-chloro-3-isobutyl-6-methylpyrazine (10, R = Me), 2-chloro-6-isobutyl-3-methylpyrazine (11, R = Me), and 2,5-dichloro-3-isobutyl-6-methylpyrazine (12, R = Me) (27, 21, and 4%, respectively).295... [Pg.139]

Hydroxymethyl-6-isobutyl-3, 6-dihydro-2,5(lH,4//)-pyrazinedione (103) gave 2-hydroxymethyl-5-isobutylpiperazme (104) (LiAlH4, THF, 0 65°C, 3... [Pg.207]

See other pages where 3- Isobutyl-3,6-dihydro-2.5 pyrazinedione is mentioned: [Pg.7]    [Pg.37]    [Pg.139]    [Pg.7]    [Pg.14]    [Pg.139]    [Pg.222]   
See also in sourсe #XX -- [ Pg.6 , Pg.36 ]



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3,6-Pyrazinedione, 1,2-dihydro

Isobutyl

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