Chiral ethyl [6-amino-4-[[12-(methoxymethylamino)-1-methyl-2-oxo

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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544350, C07D21375

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active

054849306

ABSTRACT:
The present invention relates to compounds of the formula ##STR1## wherein each of R and R.sub.1 is a lower alkyl group having from 1 to 4 carbon atoms, which are useful as intermediates to make chiral ethyl (5-amino-1,2-dihydro-2-methyl-3-phenylpyrido[3,4-b]pyrazin-7-yl)carbamate.

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Nahm et al., Tet. Letters, 22, 3815 (1981).
Schroder, Chem. Ber., 673, 186 (1963).
Cupps et al., J. Org. Chem., 50, 3972 (1985).
Barton et al., J. Chem. Soc. (C), 3540 (1971).

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