Fermentation process of preparing demethyl maytansinoids
First Claim
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1. A method for producing a demethylmaytansinoid compound of the formula:
- ##STR23## (wherein X is Cl or H;
R1 is H or acyl) characterized in that a maytansinoid compound of the formula;
##STR24## (wherein X and R1 are as respectively defined above) is contacted with a culture broth, inclusive of a processed matter of the culture broth, of a microorganism belonging to the genus Bacillus, the genus Streptomyces or the genus Actinomyces which is able to transform the 20-methoxy group of said maytansinoid compound into a hydroxy group.
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Abstract
Novel demethylmaytansinoids representable by the formula: ##STR1## (wherein X is Cl or H; R1 is H or acyl group) are produced from maytansinoids by means of enzymic transformation. The demethylmaytansinoids are useful as antifungal, antiprotozoal or antitumor agents.
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8 Claims
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1. A method for producing a demethylmaytansinoid compound of the formula:
- ##STR23## (wherein X is Cl or H;
R1 is H or acyl) characterized in that a maytansinoid compound of the formula;
##STR24## (wherein X and R1 are as respectively defined above) is contacted with a culture broth, inclusive of a processed matter of the culture broth, of a microorganism belonging to the genus Bacillus, the genus Streptomyces or the genus Actinomyces which is able to transform the 20-methoxy group of said maytansinoid compound into a hydroxy group. - View Dependent Claims (2, 3)
- ##STR23## (wherein X is Cl or H;
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4. A method for producing a demethylmaytansinoid compound of the formula:
- ##STR25## (wherein X is Cl or H) characterized in that a maytansinoid compound of the formula;
##STR26## (wherein X is as defined above;
R1 '"'"' is acyl group) is contacted with a culture broth, inclusive of a processed matter of the culture broth, of a microorganism of the genus Bacillus, the genus Streptomyces or the genus Actinomyces which is able to transform the 20-methoxy group of said maytansinoid compound into a hydroxy group to obtain a compound of the formula;
##STR27## (wherein X and R1 '"'"' are as respectively defined above) and this latter compound is then subjected to deacylation. - View Dependent Claims (5, 6, 7, 8)
- ##STR25## (wherein X is Cl or H) characterized in that a maytansinoid compound of the formula;
Specification