摘要:
Disclosed herein are substituted cyclic ether monomers, polymers, and drug conjugates thereof, which are useful for the treatment of diseases and conditions of the oral cavity. In particular, disclosed herein are monomers of Formula (I), polymers of Formula (II), drug conjugates of the monomers and polymers, and pharmaceutically acceptable salts and solvates of each: (I) (II), wherein the substituents are as described.
摘要:
The present invention concerns a process for converting biomass into useful organic building blocks for the chemical industry. The process involves the reduction of a polyol wherein at least two of the hydroxyl groups are located on adjacent carbon atoms in the presence of a molybdenum-based catalyst of the formula (I), such as (ΝΗ 4 ) 6 Μo 7 O 24 ⋅4Η 2 0. A primary or secondary monohydric C1-C4 alcohol is used as reductant, as well as a solvent.
摘要翻译:本发明涉及将生物质转化成用于化学工业的有用的有机结构单元的方法。 该方法包括还原多元醇,其中在式(I)的钼基催化剂如(N,H 4)6 M 7 O 24·4H 2 O的存在下,其中至少两个羟基位于相邻的碳原子上。 使用一级或二级一元C 1 -C 4醇作为还原剂,以及溶剂。
摘要:
The object of the invention is a novel metal complex of the formula (1), the parameters of which are as defined in the description of the invention, as well as use of the metal complex of the formula (1) in the olefin metathesis reactions.
摘要:
The present invention is directed to processes for the preparation of N-(3R, 3aS, 6aR)-hexahydrofuro[2,3-b]furan-3-yl-oxycarbonyl-, (4S,5R)-4-[4-(2-methylthiazolo-4-methyloxy)-benzyl]-5-i-butyl-[(3,4-methylenedioxyphenyl)sulfonyl]-aminomethyl-2,2-dimethyl-oxazolidine.
摘要:
The invention relates to compounds, pharmaceutical compositions and use of compounds of the general formula I, or its pharmaceutically acceptable salt or ester, wherein the substituents are defined in the application.
摘要:
Sterically hindered N-substituted alkoxyamines are prepared by the transition-metal-catalyzed decomposition of diazonium salts in the presence of a sterically hindered nitroxyl radical. These compounds are useful as thermal and light stabilizers for a variety of organic substrates.
摘要:
The present invention relates to a method for the preparation of citalopram or any of its enantiomers and acid addition salts thereof comprising reaction of a compound of formula (II), with a diene having formula (III), wherein X is O, S, SO2, -N=N-, -CO-O-, -O-CO-, or with a diene having formula (IV) wherein R is alkyl or optionally substituted aryl or arylalkyl. The invention also relates to intermediates used in the new process for the preparation of citalopram, as well as citalopram prepared according to the new process.
摘要:
Nucleophilic oxygen species, such as primary alcohols, carboxylates, and water, are added to vinyl epoxides in a highly regioselective and enantioselective manner, providing a convenient route to enantiomerically enriched 2,2-diols and oxygen-containing heterocycles. The reaction employs a chireal Pd(0) complex and a borane or borate as co-catalysts. Also described are similar additions of nitrogen nucleophils, and the addition of carbonates to vinyl epoxides using a chiral Pd(0) catalyst.
摘要:
Cyclic products are prepared by selective olefin metathesis of bifunctional or polyfunctional substrates in the presence of one or several homogeneous or heterogeneous metathesis catalysts in a reaction medium. The invention is characterised in that the substrates contain two or more functional groups in the form of substituted or non-substituted alkene or alkyne units and in that the reaction medium essentially consists of compressed carbon dioxide. Also disclosed is the preparation of cyclic or polymer products according to the disclosed process, the reaction temperature and total pressure being matched to ensure that the density of the reaction medium lies in a range d = 0.2-1.5 g/cm and that the product distribution is essentially controlled by the reaction medium density.