摘要:
Peptidyl derivatives of diesters of .alpha.-aminoalkylphosphonic acids, particularly those with proline or related structures, their use in inhibiting serine proteases with chymotrypsin-like, trypsin-like, elastase-like, and dipeptidyl peptidase IV specificity and their roles as anti-inflammatory agents, anticoagulants, and anti-tumor agents.
摘要:
A reaction medium of ethanol condensed with 1-20, most preferably 4-6 moles, of ethylene or propylene oxide per mole of ethanol greatly improves the practicality of the preparation of azacycloalkane-2,2-diphosphonic acids of the general formula I: ##STR1## where R means a hydrogen or a lower alkyl radical with from 1 to 3 carbon atoms, and n means an integer between 3 and 11, by phosphonylating the corresponding lactams with phosphonic acid and phosphorous trihalides in the presence of water.
摘要:
There are described new optically active 3,4-bis-(diphenylphosphino)-pyrrolidines of the formula ##STR1## wherein Ph is a phenyl group and R is hydrogen, an alkyl group, an arylalkyl group or an acyl group, rhodium complexes containing a compound of formula (I) as its chiral ligands, said rhodium complexes having the formula[RH(en).sub.2 A].sup.+ X.sup.- (II),where (en).sub.2 is two molecules of a monoolefin or one molecule of a diolefin, A is an optically active compound of formula (I) and X.sup.- is a tetrafluoroborate, hexafluorophosphate or a perchlorate ion, and use of the rhodium complexes as catalysts for the homogeneous asymmetric hydrogenation of unsubstituted or .beta.-substituted .alpha.-acylamino-acrylic acids.
摘要:
New mercaptoacylpyrrolidine- and mercaptoacylpiperidine phosphonic acids which have the general formula ##STR1## are useful as angiotensin converting enzyme inhibitors.
摘要:
A process for stabilizing anhydrous dibasic calcium phosphate against reaction with fluorine ions comprising treating an aqueous suspension of anhydrous dibasic calcium phosphate at a pH of from 5 to 10 with an azacycloalkane-2,2-diphosphonic acid of the formula ##STR1## wherein n is an integer from 3 to 5, or a water-soluble salt thereof, in an amount of from 0.01% to 5% by weight with reference to the anhydrous dibasic calcium phosphate; as well as tooth cleaning preparation containing the stabilized anhydrous dibasic calcium phosphate.RELATED ARTAnhydrous dibasic calcium phosphate having the formula CaHPO.sub.4 is a polishing substance frequently utilized in tooth cleaning preparations as, for example, toothpastes and powders. For this purpose it may be used alone or in admixture with other polishing substances as, for example, silica gel or plastics cleaning substances. If soluble fluorides or other compounds providing fluorine ions are added to these tooth cleaning preparations as anti-caries substances, the fluorine contained therein may be inactivated by conversion into the soluble and inactive calcium fluoride. The process thereby occurring may be represented by the following empirical reaction:CaHPO.sub.4 + 2 NaF .fwdarw. CaF.sub.2 + Na.sub.2 HPO.sub.4the speed of this inactivation reaction is influenced by several circumstances such as temperature, pH value of the mixture and its composition.For the use of a polishing agent as cleaning material in toothcleaning preparations, its abrasive behavior is of decisive importance, since products to be used for this purpose must only have an abrasive power which does not cause damage to the teeth. Owing to its favorable abrasive behavior, anhydrous dibasic calcium phosphate already enjoys great popularity as a cleaning material in tooth cleaning preparations. Its property of making the fluorine-containing compounds used for control of caries in the tooth cleaning preparation inactive or at least strongly reducing their action is, however, extremely undesirable. The problem, therefore, exists of finding ways and means largely to stop this inactivation of the fluorine-containing added substances.OBJECTS OF THE INVENTIONAn object of the present invention is the development of a process for stabilizing anhydrous dibasic calcium phosphate against reaction with fluorine ions consisting essentially of suspending anhydrous dibasic calcium phosphate in an aqueous medium at a pH of from 5 to 10, containing from 0.01% to 5% by weight based on the content of dibasic calcium phosphate of an azacycloalkane-2,2-diphosphonic compound selected from the group consisting of (A) compounds of the formula ##STR2## wherein n is an integer from 3 to 5, and (B) water-soluble salts thereof, and separating said stabilized anhydrous dibasic calcium phosphate.Another object of the present invention is the obtaining of a stabilized anhydrous dibasic calcium phosphate.A further object of the present invention is the obtaining of tooth cleaning preparations containing a stabilized anhydrous dibasic calcium phosphate.These and other objects of the present invention will become more apparent as the description thereof proceeds.
摘要:
A method of inhibiting the transport of a neurotransmitter away from the synapse comprising contacting a neurotransmitter transporter with a compound having the structure ##STR1## wherein ##STR2## or CONHR.sup.3 in any combination and and wherein R.sup.2 =OR.sup.3, NR.sup.3.sub.2, alkyl, or substituted alkyl and R.sup.3 =alkyl or substituted alkyl.
摘要翻译:一种抑制神经递质远离突触的方法,包括使神经递质转运蛋白与具有以下结构的化合物或其中R 2 = OR 3,NR 32,烷基或取代的烷基和R 3 =烷基或取代的 烷基。
摘要:
Compounds of formula I are disclosed, ##STR1## as well as processes for their production and pharmaceutical agents containing these compounds suitable for treating disorders of calcium metabolism.
摘要:
The invention relates to phosphonate-containing pseudopeptides of the hydroxyethylamine and norstatin type, to new oxirane- and thiirane-containing pseudopeptides as intermediates, to processes for their preparation and to their use as retroviral agents.
摘要:
Novel, racemic and optically active phosphorus compounds of the formula ##STR1## wherein R signifies lower alkyl, lower alkoxy or a protected hydroxy group, R.sup.1 signifies a five membered heteroaromatic ring, R.sup.2 stands for lower alkyl or lower alkoxy and n represents the number 0, 1 or 2, are described. The compounds of formula I serve in the form of complexes with a metal of Group VIII as catalyst for asymmetric hydrogenations and for enantioselective hydrogen displacements in prochiral allylic systems.