Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1973-12-17
1977-03-22
Rizzo, Nicholas S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
424246, C07D50104
Patent
active
040136507
ABSTRACT:
Compounds of the formula ##STR1## wherein R.sub.1.sup.a represents hydrogen or an amino protective group R.sub.1.sup.A and R.sub.1.sup.b represents hydrogen or an acyl group Ac, or R.sub.1.sup.a and R.sub.1.sup.b together represent a bivalent amino protective group, and R.sub.2 represents hydroxyl or a radical R.sub.2.sup.A which together with the carbonyl grouping --C(=O)-- forms a protected carboxyl group, as well as 1-oxides thereof, and salts of such compounds with salt-forming groups, are prepared from compounds of the formula ##STR2## wherein R.sub.1.sup.a and R.sub.1.sup.b have the above mentioned meaning, R denotes an acyloxy group, R.sub.2.sup.a has the meaning of R.sub.2 or R and R.sub.2.sup.o together denote an epoxy group, from a 1-oxide thereof or a salt of such a compound, by reduction with a metal which has a normal potential of -2.4 to -0.40 volt, or an amalgam thereof, at a pH of 1 to 8, in the presence of water.
REFERENCES:
patent: 3769277 (1973-10-01), Long et al.
patent: 3773761 (1973-11-01), Blackburn et al.
patent: 3775408 (1973-11-01), Ochiai et al.
patent: 3792995 (1974-02-01), Ochiai et al.
patent: 3883518 (1975-05-01), Ponticello et al.
patent: 3932393 (1976-01-01), Chauvette
Ciba-Geigy Corporation
Groeger Theodore O.
Kolodny Joseph G.
Maitner John J.
Rizzo Nicholas S.
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