摘要:
A process for preparing urethanes by reacting a primary or secondary amine with carbon monoxide, an alcohol, a catalytic quantity of a compound or complex of palladium, platinum or rhodium and a stoichiometric quantity of a copper(II) salt of a monocarboxylic acid. When the amine is aromatic, the process is conducted in the presence of a selected Lewis base promoter and a compound or complex of palladium.
摘要:
There is provided a method for enhancing the growth rate of meat-producing animals and/or improving the efficiency of feed utilization thereby, which involves, orally or parenterally, administering to said animals a growth-enhancing amount of a phenylethanolamine compound or the acid addition salt thereof.
摘要:
The invention relates to novel (meth)-acrylic acid derivatives of tricyclodecanes of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen, lower alkyl, lower alkoxy, halogen or trifluoromethyl and R.sup.3 and R.sup.4 are identical or different and represent the groups. ##STR2## in which X is a divalent bridge member comprising the group ##STR3## and Y is a linear or branched hydrocarbon chain which has 2 to 10 carbon atoms and can optionally contain oxygen bridges and is optionally substituted by 1 to 4 acrylate or methacrylate radicals, andR.sup.5 represent hydrogen or methyl andR.sup.6 represents hydrogen, lower alkyl or phenyland to their use in dental compositions.
摘要:
An addition polymerizable antioxidant is prepared by reacting an isocyanatoalkyl ester of an addition polymerizable carboxylic acid (2-isocyanatoethyl methacrylate) with an antioxidant functionality bearing an active hydrogen moiety which is reactive with the isocyanate.
摘要:
Acylated amino acids having the general formula ##STR1## are prepared by reacting a compound of formula II ##STR2## with a compound of formula IIIROCOClwherein R, R.sub.1, R.sub.2 and R.sub.3 are as defined herein.
摘要:
(Meth)-acrylic acid esters of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen, chlorine, fluorine or a C.sub.1 - to C.sub.4 -alkyl radical andR.sup.3 and R.sup.4 are identical or different and represent the group ##STR2## wherein R.sup.5 and R.sup.6 are identical or different and denote hydrogen or methyl,Z denotes a straight-chain or branched C.sub.2 - to C.sub.8 -alkylene chain andn denotes values from 1 to 4. Such (meth)-acrylic acid esters can be used as dental fillers or to coat teeth.
摘要:
Novel compounds of the general formula ##STR1## wherein Ar represents a substituted or unsubstituted aromatic or heterocyclic group; W represents alkylene of from 1 to about 10 carbon atoms; and B represents --NR.sub.2 COR.sub.1, --NR.sub.2 CONR.sub.1 R.sub.3, --NR.sub.2 SO.sub.2 R.sub.1, --NR.sub.2 SO.sub.2 NR.sub.1 R.sub.3, or --NR.sub.2 COOR.sub.1 wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and may be hydrogen, alkyl, alkoxyalkyl, cycloalkyl, alkenyl, alkynyl, aryl, heteroaryl, or aralkyl, except that R.sub.1 is not hydrogen when B is --NR.sub.2 SO.sub.2 R.sub.1 or --NR.sub.2 COOR.sub.1, or R.sub.1 and R.sub.3 may together with N form a 5 to 7 momoered heterocyclic group; and the pharmaceutically acceptable salts thereof. These compounds exhibit .beta.-adrenergic blocking activity and are also useful in the treatment of glaucoma.
摘要翻译:新颖的通式的化合物,其中Ar表示取代或未取代的芳族或杂环基团; W表示1至约10个碳原子的亚烷基; 并且B代表-NR2COR1,-NR2CONR1R3,-NR2SO2R1,-NR2SO2NR1R3或-NR2COOR1,其中R1,R2和R3可以相同或不同,可以是氢,烷基,烷氧基烷基,环烷基,烯基,炔基,芳基,杂芳基或 除了当B是-NR 2 SO 2 R 1或-NR 2 COOR 1时,R 1不是氢,或者R 1和R 3可与N一起形成5至7个手性杂环基; 及其药学上可接受的盐。 这些化合物表现出β-肾上腺素能阻断活性,并且也可用于治疗青光眼。
摘要:
A novel pest-combating agent of increased duration of action is produced by reacting a pest-combating agent having at least one hydrogen atom active in a Zerewitinoff reaction other than a hydrogen atom which is part of a carbamic acid ester group ##STR1## with a polyether isocyanate, the reaction with the polyether isocyanate taking place on said other hydrogen atom.
摘要:
The invention relates to an improved process for the production of polyamines containing urethane and/or urea and/or biuret and/or isocyanurate groups and, preferably, also alkylene ether, carbonate and/or acetal groups by the alkaline hydrolysis of corresponding compounds containing terminal aliphatic and/or aromatic isocyanate groups.To this end, the compounds containing terminal NCO-groups, preferably NCO-preadducts, are converted by means of selected bases into the carbamates and neutralized by introduction into equivalent quantities of acid or by the simultaneous introduction of the components in equivalent quantities into a reaction vessel, after which the polyamines are directly isolated by methods known per se.The invention also relates to the use of the polyamines obtained by the process for the production of polyurethanes.