Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1979-03-19
1981-05-05
Bond, Robert T.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
42424854, C07D49818
Patent
active
042658144
ABSTRACT:
Maytansinoids of the formula: ##STR1## wherein R is hydrogen or alkyl of 1 to 15 carbon atoms are produced by contacting, in the presence of a carbodiimide, maytansinol with a carboxylic acid of the formula:
REFERENCES:
patent: 4137230 (1979-01-01), Hashimoto et al.
patent: 4151042 (1979-04-01), Higashide et al.
patent: 4162940 (1979-07-01), Higashide et al.
Kupchan et al., "J. Med. Chem.", vol. 21, No. 1, pp. 31-37, (1978).
Hashimoto Naoto
Kishi Toyokazu
Bond Robert T.
Takeda Chemical Industries
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