Pyrazinoic Acid Esters with Broad Spectrum in Vitro Antimycobacterial Activity
作者:Michael H. Cynamon、Rayomand Gimi、Ferenc Gyenes、Cindy A. Sharpe、Kathryn E. Bergmann、Hye Jung Han、Livia B. Gregor、Radha Rapolu、Gregorio Luciano、John T. Welch
DOI:10.1021/jm00020a003
日期:1995.9
A series of substituted pyrazinoicacidesters has been prepared and examined for their in vitro activity against Mycobacterium avium and Mycobacterium kansasii as well as Mycobacterium tuberculosis. Modification of both the pyrazine nucleus and the ester functionality have been very successful in expanding the activity of pyrazinamide to include M. avium and M. kansasii, organisms normally not susceptible
Expeditious and practical synthesis of tertiary alcohols from esters enabled by highly polarized organometallic compounds under aerobic conditions in Deep Eutectic Solvents or bulk water
作者:Andrea F. Quivelli、Giovanna D’Addato、Paola Vitale、Joaquín García-Álvarez、Filippo M. Perna、Vito Capriati
DOI:10.1016/j.tet.2020.131898
日期:2021.2
of tertiary alcohols via nucleophilic addition of organometallic compounds of s-block elements (Grignard and organolithium reagents) to esters performed in the biodegradable choline chloride/urea eutectic mixture or in water. This approach displays a broad substrate scope, with the addition reaction proceeding quickly (20 s reaction time) and cleanly, at ambient temperature and under air, straightforwardly
Compounds and methods of synthesizing oxysterols are provided. The compounds and methods provided allow the oxysterol to be safely produced at a high yield. The compounds and methods provided can produce the oxysterol in a stereoselective manner.
METHODS FOR THE SEPARATION AND DETECTION OF AN OXYSTEROL
申请人:Warsaw Orthopedic, Inc.
公开号:US20170273990A1
公开(公告)日:2017-09-28
Assay methods for determining purity of a sample of a sterol are provided. These methods include providing an HPLC eluent including a sterol, other compounds related to the sterol and a mobile volatile phase; generating an aerosol of liquid droplets from the HPLC eluent; drying the liquid droplets to obtain residue particles of the sterol; contacting the residue particles of the sterol with an ion stream which applies a size-dependent electrical charge to each of the residue particles to generate an electrical signal and measuring the electrical signal to determine the purity of the sterol in the sample. The sterol can be OXY133 or OXY133 monohydrate.
POLYMORPHIC FORMS OF AN OXYSTEROL AND METHODS OF MAKING THEM
申请人:Warsaw Orthopedic, Inc.
公开号:US20180162900A1
公开(公告)日:2018-06-14
Compositions and methods for preparing OXY133 polymorphs Form C to Form I are provided. The methods include subjecting a slurry of OXY133 to conditions sufficient to convert OXY133 to the OXY133 polymorph Form C, polymorph Form D, polymorph Form E, polymorph Form F, polymorph Form G, polymorph Form H, polymorph Form I or a mixture thereof. A polymorph of OXY133 is also provided and that polymorph can be polymorph Form C, polymorph Form D, polymorph Form E, polymorph Form F, polymorph Form G, polymorph Form H, polymorph Form I or a mixture thereof. Pharmaceutical compositions including OXY133 polymorphs are also provided.