摘要:
This invention relates to ketones, alcohols and amines and acids represented by the likes of 3-(3-cyclopentyloxy-4-methoxyphenyl)-3-phenylcyanoclobutan-1-one. They are useful as PDE 4 antngionists.
摘要:
Phenylalkylcarboxylic acid compounds of the formula: ##STR1## wherein R.sup.1 represents an alkyl group and the like, R.sup.2 represents an alkylene group, R.sup.3 represents a hydrogen atom and the like, X represents a substituted or unsubstituted aryl group and the like, Y represents an oxygen atom and the like, Z represents an alkylene group and the like, and W represents an alkyl group and the like),the pharmacologically acceptable salts thereof or the pharmacologically acceptable esters thereof are useful as therapeutic or preventive agents for hyperglycemia and the like.
摘要:
A process for preparing bis(hydroxymethyl) compounds of the formula (I) ##STR1## wherein X.sup.1 and X.sup.2 represent identical or different electronegative groups, which process entails reacting C--H-acidic compounds of the formula (II) ##STR2## wherein X.sup.1 and X.sup.2 are as defined above, with formaldehyde, wherein the reaction is carried out in an anhydrous medium.
摘要:
The 4,4'-methylene-bis-(3-chloro-2,6-dialkylphenylisocyanates) of the general formula ##STR1## are new polyisocyanates for the production of PU systems with high chemical stability and good thermal stability.
摘要:
The subject of the present invention is a new process for obtaining nitrones. It more particularly relates to a process for obtaining N-monosubstituted hydroxylamine comprising a stage in which a nitrone is formed from a secondary amine in the presence of an oxidizing agent and of at least one C.dbd.O containing species chosen from the group consisting of carbon dioxide, hydrogencarbonates and carbonates.
摘要:
Method for preparation of fluorochlorohydrocarbon-free (FCHC-free) low-density polyurethane soft-foam materials and soft-elastic polyurethane soft-foam materials as well as polyisocyanate mixtures modified with urethane groups, and based on diphenylmethane-diisocyanate, which are applicable thereto.
摘要:
The invention concerns a process for the preparation of acyl isocyanates which consists of reacting oxalyl chloride with a salt selected from the group consisting of hydrohalides and sulphates of carboxamides and/or carbamates, unsubstituted on nitrogen, then heating the reaction mixture at a temperature between 30.degree. and 150.degree. C. The process is suitable for preparation of acyl isocyanates with excellent yields in easy to control operational conditions.