The present invention is directed to a process for purifying natamycin, to an epoxide polyene amphoteric macrolide, to a composition comprising said polyene amphoteric macrolide and to a process for preparing said polyene amphoteric macrolide.

Provided are 13-membered macrolides for the treatment of infectious diseases. The 13-membered macrolides described herein are azaketolides. Also provided are methods for preparing the 13-membered macrolides, pharmaceutical compositions comprising the 13-membered macrolides, and methods of treating infectious diseases, and in particular, disease resulting from Gram negative bacteria using the disclosed macrolides. Formula (I)

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Provided herein are methods of preparing macrolides by the coupling of an eastern and western half, followed by macrocyclization, to provide macrolides, including both known and novel macrolides. Intermediates in the synthesis of macrolides including the eastern and western halves are also provided. Pharmaceutical compositions and methods of treating infectious diseases and inflammatory conditions using the inventive macrolides are also provided. A general diastereoselective aldol methodology used in the synthesis of the western half is further provided.

Provided herein are methods of preparing macrolides by the coupling of an eastern and western half, followed by macrocyclization, to provide macrolides, including both known and novel macrolides. Intermediates in the synthesis of macrolides including the eastern and western halves are also provided. Pharmaceutical compositions and methods of treating infectious diseases and inflammatory conditions using the inventive macrolides are also provided. A general diastereoselective aldol methodology used in the synthesis of the western half is further provided.

Defined herein are immunomodulating Formula (1) compounds wherein R.sup.1, R.sup.2, R.sup.3, and W are as defined herein, stereoisomers thereof, and pharmaceutically acceptable salts thereof; and compositions comprising said compounds. The invention also includes methods for treating an inflammatory and/or immunological disease or disorder in an animal by administering a therapeutically effective amount of a Formula (1) compound, stereoisomer thereof, and a pharmaceutically acceptable salt thereof; or use of said compound of Formula (1) to prepare a medicament for treating an inflammatory and/or immunological disease or disorder in an animal.

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Defined herein are immunomodulating Formula (1) compounds wherein R.sup.1, R.sup.2, R.sup.3, and W are as defined herein, stereoisomers thereof, and pharmaceutically acceptable salts thereof; and compositions comprising said compounds. The invention also includes methods for treating an inflammatory and/or immunological disease or disorder in an animal by administering a therapeutically effective amount of a Formula (1) compound, stereoisomer thereof, and a pharmaceutically acceptable salt thereof; or use of said compound of Formula (1) to prepare a medicament for treating an inflammatory and/or immunological disease or disorder in an animal.

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Defined herein are immunomodulating Formula (1) compounds, wherein R, R.sup.0, R.sup.1, R.sup.2

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and W are as defined herein, stereoisomers thereof, and pharmaceutically acceptable salts thereof; and compositions comprising said compounds. The invention also includes methods for treating or preventing an inflammatory and/or immunological disease or disorder in an animal by administering a therapeutically effective amount of a Formula (1) compound, stereoisomer thereof, or pharmaceutically acceptable salt thereof; or use of said Formula (1) compound to prepare a medicament for treating or preventing an inflammatory and/or immunological disease or disorder in an animal.

Provided herein are methods of preparing macrolides by the coupling of an eastern and western half, followed by macrocyclization, to provide macrolides, including both known and novel macrolides. Intermediates in the synthesis of macrolides including the eastern and western halves are also provided. Pharmaceutical compositions and methods of treating infectious diseases and inflammatory conditions using the inventive macrolides are also provided. A general diastereoselective aldol methodology used in the synthesis of the western half is further provided.

Provided herein are methods of preparing macrolides by the coupling of an eastern and western half, followed by macrocyclization, to provide macrolides, including both known and novel macrolides. Intermediates in the synthesis of macrolides including the eastern and western halves are also provided. Pharmaceutical compositions and methods of treating infectious diseases and inflammatory conditions using the inventive macrolides are also provided. A general diastereoselective aldol methodology used in the synthesis of the western half is further provided.

Macrolide compound and its use of treatment chronic respiratory disease are provided. Specifically, the macrolide compound is of formula (I) or pharmaceutically acceptable salts, stereoisomers and application thereof are effective in treating chronic respiratory disease.