acid represents the key design element of a totalsynthesis of all known members of the ipomoeassin family of resin glyosides. This protecting group maneuver allows the unsaturated acids decorating the glucose subunit of the targets to be attached at an early phase of the synthesis, prevents their participation in the ruthenium‐catalyzed ring‐closing metathesis (RCM) used to form the macrocyclic ring,
Embodiments of the disclosure relate to selectively substituted quinoline compounds that act as antagonists or inhibitors for Toll-like receptors 7 and/or 8, and their use in pharmaceutical compositions effective for treatment of systemic lupus erythematosus (SLE) and lupus nephritis.
Using sultone chemistry, a short and highly enantioselective synthesis of an advanced precursor for the larger hydroxy acid moiety and of the complete smaller hydroxy acid portion of the macrodiolide antibiotic pamamycin-607 has been accomplished.
Enantioselective Epoxidation of Terminal Alkenes to (R)- and (S)-Epoxides by Engineered Cytochromes P450 BM-3
作者:Takafumi Kubo、Matthew W. Peters、Peter Meinhold、Frances H. Arnold
DOI:10.1002/chem.200500584
日期:2006.1.23
CytochromeP450BM-3 from Bacillus megaterium was engineered for enantioselectiveepoxidation of simple terminalalkenes. Screening saturation mutagenesis libraries, in which mutations were introduced in the active site of an engineeredP450, followed by recombination of beneficial mutations generated two P450BM-3 variants that convert a range of terminalalkenes to either (R)- or (S)-epoxide (up