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| Number | Title | Issue Date |
| 4997959 | Process for the production of alpha-6-deoxytetracyclines A process for the hydrogenation of a 6-methylenetetracycline in the production of alpha-6-deoxytetracycline, particularly the antibiotic doxycycline, in the presence of a transition metal complex of the formula MClx (PPh3)y | 03/05/1991 |
| 4990636 | Process for the production of alpha-6-deoxytetracyclines and hydrogenation catalyst useful therein A coordination compound useful as a hydrogenation catalyst, having the formula: ##STR1## wherein Ph is phenyl; R is hydrogen or C1 -C4 alkyl; and X is chloro, bromo or iodo. This compound is particularly useful as a homogen... | 02/05/1991 |
| 4973719 | Process for the production of alpha-6-deoxytetracyclines A process for the hydrogenation of a 6-methylenetetracycline in the production of alpha-6-deoxytetracyclines, particularly the antibiotic doxycycline, in the presence of hydriodotetrakis (triphenylphosphine) rhodium (I) as a homogenous hydrogenation catal... | 11/27/1990 |
