Heteroaryl-beta-alanine derivatives as alpha 4 integrin inhibitors
申请人:——
公开号:US20020086882A1
公开(公告)日:2002-07-04
Disclosed are a series of heteroaryl-&bgr;-alanine derivatives, compositions containing them, processes for their preparation and their use in medicine.
揭示了一系列杂环芳基-β-丙氨酸衍生物,包含它们的组合物,其制备方法以及在医学中的应用。
Method for preserving quaternary ammonium salt
申请人:——
公开号:US20030153785A1
公开(公告)日:2003-08-14
A method of improving the stability of a quaternary ammonium salt and a method of efficiently preparing the quaternary ammonium salt having improved stability.
一种提高季铵盐稳定性的方法和一种高效制备稳定性提高的季铵盐的方法。
Phenylalanine derivatives as alpha 4 integrin inhibitors
申请人:——
公开号:US20020055509A1
公开(公告)日:2002-05-09
Disclosed are a series of phenylalanine derivatives, to compositions containing them, to processes for their preparation, and to their use in medicine.
本发明涉及一系列苯丙氨酸衍生物,涉及含有它们的组合物,涉及它们的制备过程以及它们在医学中的使用。
PROCESS FOR PRODUCING CARBOXYLIC ACID DERIVATIVE AND CONDENSING AGENT COMPRISING QUATERNARY AMMONIUM SALT
申请人:TOKUYAMA CORPORATION
公开号:EP1085000A1
公开(公告)日:2001-03-21
A process for producing a carboxylic acid derivative characterized by mixing a quaternary ammonium salt having a specific triazine ring in the molecule, a carboxylic acid compound, and a compound having a nucleophilic functional group to conduct the condensation reaction of the carboxylic acid compound with the compound having a nucleophilic functional group; and a condensing agent comprising the quaternary ammonium salt. By the process, the condensation reaction can be conducted under mild conditions and a carboxylic acid derivative, especially an amide or ester compound, can be obtained in high yield.
The present invention aims to provide a method for producing a polyrotaxane which enables industrially advantageous production of a polyrotaxane with a high inclusion rate.
The present invention relates to a method for producing a polyrotaxane that includes a cyclodextrin; a compound having a repeating structural unit represented by the following formula (1), and threading through a cavity of the cyclodextrin in a skewered manner to be included in the cyclodextrin; and capping groups individually placed at each end of a molecule of the compound having a repeating structural unit represented by the formula (1) to prevent the cyclodextrin from separating, the method comprising: a step 1 of mixing the compound having a repeating structural unit represented by the formula (1) and the cyclodextrin in an aqueous medium to prepare an aqueous dispersion of pseudopolyrotaxan particles in which the compound having a repeating structural unit represented by the formula (1) is included in a cavity of a cyclodextrin molecule in a skewered manner; and a step 2 of mixing a triazine compound represented by the formula (2), a compound having at least one tertiary amino group, the aqueous dispersion of pseudopolyrotaxane particles prepared in the step 1, and a capping agent to introduce capping groups individually at each end of a molecule of the compound having a repeating structural unit represented by the formula (1) in the pseudopolyrotaxane particles,
wherein, in the formula (2), R1 and R2 are each independently a C1-C4 alkyl group or a C6-C8 aryl group, and X represents a halogen atom.