Novel antiparasitic agents derived by modification of a new natural product series
作者:Michael V.J. Ramsay、Stanley M. Roberts、Jeremy C. Russell、Anthony H. Shingler、Alexandra M.Z. Slawin、Derek R. Sutherland、Edward P. Tiley、David J. Williams
DOI:10.1016/s0040-4039(00)96728-5
日期:1987.1
Regioselective reactions on the C5-, C7- and C23-hydroxyl groups of the macrocyclic lactones (1), (3) and (4) are described.
Process for the preparation of 23-(C1-C6 alkyloxime)-LL-F28249 compounds
申请人:——
公开号:US04988824A1
公开(公告)日:1991-01-29
There is provided a process for the preparation of 23-(C.sub.1 -C.sub.6 alkyloxime)-LL-F28249 compounds via the oxidation of crystalline 5-O-p-nitrobenzoyl-LL-F28249 compounds.
The present invention relates to novel 23-imino derivatives of LL-F28249.alpha., .beta., .gamma., .delta., .epsilon., .zeta., .theta., .iota., and .lambda. compounds. These LL-F28249 compounds (collectively) are isolates from the fermentation broth of Streptomyces cyaneogrisesu subspecies noncyanogenus having deposit accession number NRRL 15773. The precursor 23-oxo compounds are prepared by selectively oxidizing suitably protected 23-hydroxy compounds of LL-F28249 components using oxidizing agents. Subsequently, the 23-oxo compounds are converted to the 23-imino compounds. These novel compounds have potent anthelmintic, insecticidal, ectoparasiticidal, nematicidal and acaricidal activity. Compositions containing these 23-oxo and 23-imino derivatives of LL-F28249 also are described herein.