| 摘要 |
The invention relates to the preparation of 6-demethyl-6-deoxy-6-methylene-tetracycline by means of reductive dehalogenation of the corresponding 11a-halo-6-demethyl-6-deoxy-6-methylene-tetracycline, the reaction being carried out in presence of the stoichiometric quantity of a tertiary phosphine, arsine or stibine and in a polar solvent. The time and temperature of the reaction are controlled within specified limits to obtain a complete conversion. |
