6-Isopropyl-3,5-dimethyl-2 pyrazinone

Dimethylamino-2,2-dimethyl-2//-azirine (27) and 4-isopropyl-2-trifluo-romethyl-5-oxazolinone (28) gave 5-dimethylamino-3-isopropyl-6,6-di-methyl-3,6-dihydro-2(l//)-pyrazinone (29) (MeCN, reflux, N2, 1 h 60% a rational mechanism was suggested) 944 analogues, like 3-allyl-5-dimethy-lamino-6,6-dimethyl-3-phcnyl-3,6-dihydro-2(l//)-pyrazinone (44%),958 were made similarly.944 958... [Pg.51]

C-Acetylformamido)-4-isopropyl-3-methyl-4,5-dihydro-5-isoxazolone (55) gave 6-isopropyl-3,5-dimethyl-2 (1 //)-pyrazinone (56) [Lindlar catalyst (Pd/CaC03/trace Pb), H2, EtOH, 20°C, 10 h 90%] also several homologues likewise and in comparable yields.227... [Pg.55]

Isopropyl-5,6-dimethyl-2(l//)-pyrazinone 6-Isopropyl-3,5-dimethyl-2(l//)-pyrazinone 3-Isopropyl-5,6-diphenyl-2(l//)-pyrazinone 6-(/V -Isopropylhydrazinecarbonyl)-/Y-methyl)-... [Pg.434]

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