Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1981-12-11
1984-03-13
Rizzo, Nicholas S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
544 22, 424246, C07D50104
Patent
active
044369034
ABSTRACT:
The invention relates to a novel advantageous process for the production of compounds of the formula ##STR1## wherein n is 1, R.sub.1.sup.a is hydrogen or an amino protective group R.sub.1.sup.A, R.sub.1.sup.b is hydrogen or an acyl group Ac, or R.sub.1.sup.a and R.sub.1.sup.b together are a bivalent amino protective group, R.sub.2 is hydroxyl or a radical which, together with the carbonyl grouping --C(.dbd.O)--, forms a protected carboxyl group, and the group of the formula --N(R.sub.3.sup.a) (R.sub.3.sup.b) is a secondary or tertiary amino group, or a salt thereof with salt-forming groups. The process comprises reaction of the corresponding 3-amino compounds with borohydrides in the presence of acids.
REFERENCES:
patent: 4001226 (1977-01-01), Spry
patent: 4013651 (1977-03-01), Slitzer
patent: 4246405 (1981-01-01), Takaya et al.
Scartazzini Riccardo
Sedelmeier Gottfried
Ciba-Geigy Corporation
Feit Irving N.
Rizzo Nicholas S.
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