摘要:
A composition for use by injection as an anaesthetic comprising 3 Alpha -hydroxy 5 Alpha - pregnane - 11,20 dione in solution in an inert organic liquid medium. The composition may be in the form of a solution which also contains water, a non-aqueous solution or an emulsion or microemulsion. The emulsions and microemulsions are preferably of the oil-in-water type. Water-miscible substances which may be used as or in the liquid medium include polyhydroxy alcohols and water-soluble esters and amides. Other substances which may be used as the liquid medium include oils, long chain alcohols and esters, and fatty acid esters.
摘要:
A process for the preparation of esters of DL-2-amino-2arylacetic acids in which a 2-arylacetic acid ester is nitrosated and then, without separation of the individual nitrosation products, reduced to yield the desired DL-2-amino-2-arylacetic acid ester. 2-Amino-2-arylacetic acids, and more particularly D-2-amino-2phenylacetic acid, are valuable intermediates in the synthesis of anti-biotics of the penicillin and cephalosporin types. The present invention provides a relatively cheap, high yield process for the preparation of esters of DL-2-amino-2-arylacetic acids and also, by a modification, for the preparation of the acids themselves. The process is described and exemplified.
摘要:
The invention is concerned with two novel crystalline forms of the antibiotic cephaloridine which are relatively non-hygroscopic compared with previously known forms of cephaloridine and hence possess important advantages in handling and formulation. The novel crystalline forms are characterised in particular by X-ray crystallographic data set out in detail in the following disclosure.
摘要:
A process for the N-deacylation of a 7 Beta -phenoxyacetamido cephalosporin which comprises subjecting the cephalosporin to the action of an amidohydrolase enzyme which is derived from a bacterial source, e.g. Erwinia aroideae, which is free from cells and deleterious enzymes, which is stabilised in solution by the presence of ferrous ions and which is effective to cause optimal N-deacylation at a pH of from 3.5 to 6.5.
摘要:
A new group of cephalosporin compounds characterized by possessing as 3-position substituent a phosphoranylidene ethyl group. The new compounds can be used as intermediates in the production of cephalosporin antibiotics characterized by possessing an ethyl or substituted ethyl group as 3-position substituent.
摘要:
7 Beta -Acylamidoceph-3-em-4-carboxylic acids having an etherified hydroxymethyl group at the 3-position and physiologically acceptable derivatives thereof. The compounds have utility as antibiotics and show absorption after oral administration.
摘要:
A PROCESS FOR PREPARING CEPHALOSPORIN COMPOUNDS HAVING A SUBSTITUTED METHYL GROUP AT THE 3-POSITION WHICH COMPRISES REACTING A CORRESPONDING CEPHALOSPORIN COMPOUND HAVING A DIFFERENT SUBSTITUTED METHYL GROUP AT THE 3-POSITION WITH AN ONIUM SALT CORRESPONDING TO THE MEDIA, THE ANION OF THE ONIUM SALT CORRESPONDING TO THE DESIRED METHYL SUBSTITUENT.
摘要:
THE SPECIFICATION DESCRIBES NEW ANDROSTANE COMPOUNDS HAVING ANTI-INFLAMMATORY ACTIVITY. THE NEW ANDROSTANCES DESCRIBED IN THE SPECIFICATION HAVE AN ESTERFIELD 17B-CARBOXYLICC ACID GROUPING WHEREIN THE ALCOHOL RESIDUE COMPRISES EITHER AT LEAST ONE HALOGEN ATOM OR A LOWER ALKOXYBY EITHER AT LEAST ONE HALOGEN ATOM OR A LOWER ALKOXYCARBONYL GROUP OR A (C2-4) LOWER ALKYL GROUP SUBSTITUTED BY A LOWER ACYLOXY GROUP. THE 17A-GROUPING OF THESE ANDROSTANCES IS AN ESTERIFIED HYDROXY GROUP COMPRISING A FORMLY, C2-4 ALKANOYL OR BENZOYL GROUP.
摘要:
THE INVENTIOON PROVIDES A NEW ANAESTHETIC SUBSTANCE, NAMELY, 3A-HYDROXY-19-NOR-5A-PREGNANE-11,20-DONE, AND A METHOD FOR ITS MANUFACTURE WHEREBY (A) 19 - NOR 5A-PREGNANE-3,11,20-TRIONE IS REDUCED, E.G. USING AN IRIDIUM CATA YST REDUCTION SYSTEM OR (B) 3A-HYDROXY -19NOR-5-APREGNANE-16-ONE-11,20-DIONE IS HYDROGENATED. THE INVENTION ALSO INCLUDES PHARMACEUTICAL COMPOSITIONS CONTAINING THE NEW COMPOUND AND A METHOD OF INDUCING ANAESTHESIA BY ADMINISTRATION OF THE NEW COMPOUND.
摘要:
THE INVENTION RELATES TO A PROCESS FOR THE PREPARATION OF 7B-ACYLAMIDO-3-METHYLCEPH-3-EM-4-CARBOXYLIC ACID ESTERS FROM 6B-ACYLAMIDO-PENICILLANIC ACID 1-OXIDE ESTERS IN THE PRESENCE OF AN ACID CATALYST IN ADVANTAGEOUS YIELDS BY CAREFUL SELECTION OF THE SOLVENT USED IN THE REACTION, THE ACID CATALYST AND THE TEMPERATIVE AND DURATION OF THE REACTION.