摘要:
The present invention provides novel macrolide compounds of the formulas (I, II, III or IV) wherein: R is hydroxyl or methoxy; R1 is selected from the group consisting of hydrogen, hydroxyl, halide, NH¿2, OR?9, (a, b, c, and d) where R9 is C1-C10 alkenyl, C2-C10 alkynyl, aryl or heteroaryl and R?10 and R11¿ are each independently hydrogen, C¿1?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or aryl; R?2 and R3¿ are each independently selected from the group consisting of hydrogen, C¿1?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, alkylaryl, alkenylaryl, alkynylaryl or R?2 and R3¿ together form a cycloalkyl or a cycloaryl moiety; R4 is hydrogen or methyl; R5 is hydrogen, hydroxyl, oxo, or together with R6 and the carbons to which they are attached form a cyclic carbonate; R6 is hydrogen, hydroxyl, OR12 where R12 is C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or together with R5 and the carbons to which they are attached form a cyclic carbonate; R7 is methyl, C3-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, alkylaryl, alkenylaryl, alkynylaryl, amidoalkylaryl, amidoalkenylaryl, or amidoalkynylaryl; R8 is C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, alkylaryl, alkenylaryl, alkynylaryl, amidoalkylaryl, amidoalkenylaryl, or amidoalkynylaryl; and, x is a single or a double bond.
摘要:
Recombinant Myxococcus host cells can be used to produce polyketides, including epothilone and epothilone analogs that can be purified from the fermentation broth and crystallized.
摘要:
Macrolactams are made by feeding aromatic amino acids as replacement starter units to a mutant strain of the geldanamycin-producing microorganism Streptomyces hygroscopicus var. geldanus NRRL 3602, wherein the gene cluster encoding enzymes for the biosynthesis of the natural starter unit 3-amino-5-hydroxybenzoic acid has been deleted.
摘要:
Laulimalide compounds, intermediates thereto and methods for their preparation and methods for their use in the treatment of diseases characterized by cellular hyperproliferation. Formula (I).
摘要:
The present invention includes compounds of the formula wherein: X is hydrogen or halide; R2 is hydrogen, acyl, or a hydroxy protecting group; R6 is hydrogen, hydroxyl, or -ORa wherein Ra is a substituted or unsubstituted moiety selected from the group consisting of C¿1?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, heterocyclo, aryl(C1-C10)alkyl, aryl(C2-C10)alkenyl, aryl(C2-C10)alkynyl, heterocyclo(C1-C10)alkyl, heterocyclo(C2-C10)alkenyl, and heterocyclo(C2-C10)alkynyl; R?13¿ is hydrogen or a substituted or unsubstituted moiety wherein the moiety is selected from the group consisting of methyl; C¿3?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, heterocyclo, aryl(C1-C10)alkyl, aryl(C2-C10)alkenyl, aryl(C2-C10)alkynyl, heterocyclo(C1-C10)alkyl, heterocyclo(C2-C10)alkenyl, and heterocyclo(C2-C10)alkynyl;and, R is hydrogen or a substituted or unsubstituted moiety wherein the moiety is selected from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, heterocyclo, aryl(C1-C10)alkyl, aryl(C2-C10)alkenyl, aryl(C2-C10)alkynyl, heterocyclo(C1-C10)alkyl, heterocyclo(C2-C10)alkenyl, and heterocyclo(C2-C10)alkynyl;and the pharmaceutically acceptable salts, esters and pro-drug forms thereof. These compounds possess anti-infective activity and are useful for the treatment of bacterial and protozoal infections.
摘要:
A multiple-plasmid system for heterologous expression of polyketides facilitates combinatorial biosynthesis. The method can be extended to any modular polyketide synthase (PKS) or non-ribosomal peptide synthase (NRPS) and has the potential to produce thousands of novel natural products, including ones derived from further modification of the PKS or NRPS products by tailoring enzymes.
摘要:
Facile methods for preparing diketide and triketide thioesters are disclosed. The resulting thioesters may be used as intermediates in the synthesis of desired polyketides, and may contain functional groups which ultimately reside in side chains on the resulting polyketide and thus can be used further to manipulate the polyketide so as to form derivatives. The polyketides produced may also be tailored by glycosylation, hydroxylation and the like. New polyketides and their derivatives and tailored forms are thereby produced.