Echinocandine derivatives with antimicrobial activity

Details Echinocandine derivatives with antimicrobial activity Echinocandine derivatives with antimicrobial activity

1999-12-01

2001-12-18

Davenport, Avis M. (Department: 1653)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Peptide containing doai

C514S011400, C530S300000, C530S317000, C530S333000

Reexamination Certificate

active

06331521

ABSTRACT:

TECHNICAL FIELD
The present invention relates to new polypeptide compounds and salts thereof which are useful as a medicament.
BACKGROUND ART
In U.S. Pat. Nos. 5,376,634, 5,502,033, etc., there are disclosed the polypeptide compound and a salt thereof, which have antimicrobial activities (especially antifungal activity).
DISCLOSURE OF INVENTION
The present invention relates to new polypeptide compounds (hereinafter referred to as WF 738 derivative) and salts thereof.
More particularly, it relates to new polypeptide compound and salts thereof, which have antimicrobial activities [especially, antifungal activities, in which the fungi may include Asperaillus, Cryptococcus, Candida, Mucor, Actinomyces, Histoplasma, Dermatophyte, Malassezia, Fusarium and the like.], inhibitory activity on &bgr;-1,3-glucan synthase, and further which are expected to be useful for the prophylactic and/or therapeutic treatment of
Pneumocystis carinii
infection (e.g.
Pneumocystis carinii
pneumonia) in a human being or an animal, to a process for preparation thereof, to a pharmaceutical composition comprising the same, and to a method for the prophylactic and/or therapeutic treatment of infectious diseases including
Pneumocystis carinii
infection (e.g.
Pneumocystis carinii
pneumonia) in a human being or an animal.
The object polypeptide compound of the present invention is new and can be represented by the following general formula [I]:
wherein
R
1
is hydrogen or acyl group,
R
2
is hydrogen or hydroxy,
R
3
is hydrogen or methyl, and
R
4
is hydrogen or hydroxy,
with proviso that
when R
4
is hydroxy, then R
2
is hydroxy,
or a salt thereof.
The polypeptide compound [I] of the present invention can be prepared by the processes as illustrated in the following schemes.
wherein
R
a
1
is higher alkanoyl, and
R
c
1
is acyl group exclusive of palmitoyl,
R
2
, R
3
and R
4
are each as defined above.
Suitable salt of the object compound [I] is pharmaceutically acceptable and conventional non-toxic mono or di salt and include a metal salt such as an alkali metal salt [e.g. sodium salt, potassium salt, etc.] and an alkaline earth metal salt [e.g. calcium salt, magnesium salt, etc.], an ammonium salt, an organic base salt [e.g. trimethylamine salt, triethylamine salt, N,N-diisopropylethylamine salt, pyridine salt, picoline salt, dicyclohexylamine salt, N,N-dibenzylethylenediamine salt, etc.], an organic acid addition salt [e.g. formate, acetate, trifluoroacetate, maleate, tartrate, methanesulfonate, benzenesulfonate, toluenesulfonate, etc.], an inorganic acid addition salt [e.g. hydrochloride, hydrobromide, hydroiodide, sulfate, phosphate, etc.], a salt with an amino acid [e.g. arginine salt, aspartic acid salt, glutamic acid salt, etc.], and the like.
In the above and subsequent descriptions of the present specification, suitable examples and illustration of the various definitions which the present invention intends to include within the scope thereof are explained in detail as follows.
The term “lower” is intended to mean 1 to 6 carbon atom(s), unless otherwise indicated.
The term “higher” is intended to mean 7 to 20 carbon atoms, unless otherwise indicated.
The term “one or more” may be the number of 1 to 6, unless otherwise indicated.
Suitable example of “halogen” may be fluoro, chloro, bromo, iodo, and the like.
Suitable example of “lower alkoxy” may include straight or branched one such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, tert-butoxy, pentyloxy, tert-pentyloxy, neo-pentyloxy, hexyloxy, isohexyloxy, and the like, in which the preferred one may be propoxy, pentyloxy and hexyloxy.
Suitable example of “higher alkoxy” may include straight or branched one such as heptyloxy, octyloxy, 3,5-dimethyloctyloxy, 3,7-dimethyloctyloxy, nonyloxy, decyloxy, undecyloxy, dodecyloxy, tridecyloxy, tetradecyloxy, hexadecyloxy, heptadecyloxy, octadecyloxy, nonadecyloxy, icosyloxy, and the like, in which the preferred one may be (C
7
-C
14
)alkoxy, and the most preferred one may be octyloxy.
Suitable example of “lower alkyl” may include straight or branched one having 1 to 6 carbon atom(s), such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, tert-pentyl, neo-pentyl, hexyl, isohexyl, and the like.
Suitable example of “higher alkyl” may include straight or branched one having 7 to 20 carbon atoms, such as heptyl, octyl, 3,5-dimethyloctyl, 3,7-dimethyloctyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, icosyl, and the like.
Suitable example of “aryl” and “ar” moiety may include phenyl which may have lower alkyl (e.g., phenyl, mesityl, tolyl, etc.), naphthyl, anthryl, and the like, in which the preferred one may be phenyl.
Suitable example of “aroyl” may include benzoyl, toluoyl, naphthoyl, anthrylcarbonyl, and the like, in which the preferred one may be benzoyl.
Suitable example of “heterocyclic group” and “heterocyclic” moiety may include
unsaturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 4 nitrogen atom(s), for example, pyrrolyl, pyrrolinyl, imidazolyl, pyrazolyl, pyridyl, dihydropyridyl, pyrimidyl, pyrazinyl, pyridazinyl, triazolyl (e.g., 4H-1,2,4-triazolyl, 1H-1,2,3-triazolyl, 2H-1,2,3-triazolyl, etc.), tetrazolyl (e.g., 1H-tetrazolyl, 2H-tetrazolyl, etc.), etc.;
saturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 4 nitrogen atom(s), for example, pyrrolidinyl, imidazolidinyl, piperidyl, piperazinyl, etc.;
unsaturated condensed heterocyclic group containing 1 to 4 nitrogen atom(s), for example, indolyl, isoindolyl, indolinyl, indolizinyl, benzimidazolyl, quinolyl, isoquinolyl, indazolyl, benzotriazolyl, etc.;
unsaturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 2 oxygen atom(s) and 1 to 3 nitrogen atom(s), for example, oxazolyl, isoxazolyl, oxadiazolyl (e.g., 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl, 1,2,5-oxadiazolyl, etc.), etc.;
saturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 2 oxygen atom(s) and 1 to 3 nitrogen atom(s), for example, morpholinyl, sydnonyl, etc.;
unsaturated condensed heterocyclic group containing 1 to 2 oxygen atom(s) and 1 to 3 nitrogen atom(s), for example, benzoxazolyl, benzoxadiazolyl, etc.;
unsaturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 2 sulfur atom(s) and 1 to 3 nitrogen atom(s), for example, thiazolyl, isothiazolyl, thiadiazolyl (e.g., 1,2,3-thiadiazolyl, 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, 1,2,5-thiadiazolyl, etc.), dihydrothiazinyl, etc.;
saturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 2 sulfur atom(s) and 1 to 3 nitrogen atom(s) for example, thiazolidinyl, etc.;
unsaturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing 1 to 2 sulfur atom(s), for example, thienyl, dihydrodithiinyl, dihydrodithionyl, etc.;
unsaturated condensed heterocyclic group containing 1 to 2 sulfur atom(s) and 1 to 3 nitrogen atom(s), for example, benzothiazolyl, benzothiadiazolyl, imidazothiadiazolyl, etc.;
unsaturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing an oxygen atom, for example, furyl, etc.;
saturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing an oxygen atom, for example, tetrahydrofuran, tetrahydropyran, etc.;
unsaturated 3 to 8-membered (more preferably 5 or 6-membered) heteromonocyclic group containing an oxygen atom and 1 to 2 sulfur atom(s), for example, dihydrooxathiinyl, etc.;
unsaturated condensed heterocyclic group containing 1 to 2 sulfur atom(s), for example, benzothienyl, benzodithiinyl, etc.;
unsaturated condensed heterocyclic group containing an oxygen atom and 1 to 2 sulfur atom(s), for example, benzoxathiinyl, etc.; and the like.
Suitable example of

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