The present invention relates to a process for producing chlorothioformate comprising reacting an alkenyl mercaptan with phosgene in a reactor in the presence of a carboxylic acid amide in an organic solvent, characterized in that the carboxylic acid amide is preliminary charged to the reactor in an amount of 10 to 50% by weight based on the whole amount of the carboxylic acid amide, and subsequently, the compound of the formula (I), phosgene and the remaining carboxylic acid amide are charged to the reactor.
Delivery of immune response modifier compounds using metal-containing particulate support materials
申请人:3M Innovative Properties Company
公开号:US20040202720A1
公开(公告)日:2004-10-14
The present invention provides immune response modifiers (IRMs) on particulate support materials that includes one or more metals, including alloys or complexes thereof.
本发明提供了一种包括一种或多种金属(包括合金或配合物)的颗粒支持材料上的免疫应答调节剂(IRM)。
A New Method for the Esterification of Carboxylic Acids with Various Alcohols by Using Di-2-thienyl Carbonate, a New Coupling Reagent
Esterification of carboxylic acids with alcohols by using di-2-thienyl carbonate in the presence of a catalytic amount of 4-(dimethylamino)pyridine (DMAP) proceeded smoothly under mild conditions t...
Successive reactions of ω-hydroxycarboxylic acids with an equimolar amount of di-2-thienyl carbonate (2-DTC) in the presence of a catalytic amount of 4-(dimethylamino)pyridine (DMAP) followed by an addition of 2–4 equimolar amounts of iodine afforded the corresponding lactones in good to high yields.
HYDROPHOBIC POLYSACCHARIDES WITH DIESTER- OR CARBONATE ESTER-CONTAINING LINKAGES HAVING ENHANCED DEGRADATION
申请人:Swan Dale G.
公开号:US20100316687A1
公开(公告)日:2010-12-16
Hydrophobic α(1→4)glucopyranose polymers with enhanced degradation properties are described. Between the α(1→4)glucopyranose polymeric portion and the hydrophobic portion exists a linker portion having a chemistry that facilitates degradation of the polymer. Diester and carbonate ester linker chemistries are exemplified. Biodegradable matrices can be formed from these polymers, and the matrices can be used for the preparation of implantable and injectable medical devices wherein the matrix is capable of degrading in vivo at an increased rate. Matrices including and capable of releasing a bioactive agent in vivo are also described.