摘要:
Penicillin is prepared in an industrially advantageous manner by reacting 6-amino-penicillanic acid with silylhalides, to protect the carboxyl group of the 6-aminopenicillanic acid, by forming a mixed acid anhydride grouping, then reacting the above obtained product in the presence of an acid-binding agent with reactive derivatives of carboxylic acid, and then solvolyzing the product to remove the protecting group of the carboxy group to form penicillin.
摘要:
Penicillin or penicillin sulfoxide esters are prepared in an industrially advantageous manner, by reacting an N,Ndisubstituted acid amide with a halogenating agent, reacting the thus obtained product with a salt of penicillin or penicillin sulfoxide, and then reacting the product with an hydroxy compound in the presence of an acid-binding agent.
摘要:
7-Aminocephalosporanic acids have been prepared in an industrially advantageous manner, by reacting 7aminocephalosporanic acids with a halogenated compound, represented by the formula (III-1) to (III-4), in the presence of an acid-binding agent, to protect the carboxy group of the said 7-acylamidocephalosporanic acid derivatives, by forming a mixed acid anhydride grouping, converting the reaction product into the corresponding imino halide by further reaction with an imino halide-forming reagent, converting the resultant imino halide into the corresponding iminoether, and removing the protecting group of the carboxyl group to form 7-aminocephalosporanic acids.
摘要:
SELECTIVE SEPARATION OF THE TRI-SUBSTITUTED HYDROCARBYL PHOSPHATES ONLY BY EXTRACTION FROM AN AQUEOUS SOLUTION OF WATER-SOLUBLE TRI-SUBSTITUTED HYDROCARBYL PHOSPHATES OF THE FORMULA (RO)2P(O)(OR'') WHEREIN R IS AN ALKYL OR ALKENYL GROUP HAVING 1 TO 3 CARBON ATOMS OR SAID GROUPS SUBSTITUTED BY CHLORINE AND R'' IS AN ALKYL OR ALKENYL GROUP HAVING 1 TO 4 CARBON ATOMS OR SAID GROUPS SUBSITUTED BY CHLORINE. THE COMPOUNDS ARE USEFUL AS ADDITIVES FOR GASOLINE, PLASTICIZERS FOR THERMOPLASTIC RESINS AND FLAME RETARDING AGENTS FOR RIGID POLYURETHANE FOAM, POLYESTER RESIN, ETC.
摘要:
Penicillin esters are produced by reacting penicillin derivatives with organic sulfonylhalides and organic hydroxy compounds in the presence of an acid-binding agent.
摘要:
7-ACYLAMIDE-3-CEPHEM-4-CARBOXYLIC ACIDS ARE PREPARED IN AN INDUSTRIALLY ADVANTAGEOUS MANNER, BY REACTING A 7-AMINO-3-CEPHAM4-CARBOXYLIC ACID WITH THE REACTIVE DERIVATIVES OF A CARBOXYLIC ACIDS IN THE PRESENCE OF ALCOHOLS, AS A SOLVENT, AND THEREAFTER, IF NECESSARY, REMOVING THE PROTECTING GROUP FOR THE AMINO GROUP OF THE ABOVE-OBTAINED PRODUCTS.
摘要:
A 7-Acylamino-3-methyl-3-cephem-4-carboxylic acid is prepared by first forming a 7-acylamino-3-methyl-3-cephem-4-carboxylic acid ester by heating a 6-acyl-aminopenicillanic acid ester S-oxide in the presence of a catalyst consisting of an acid and a sulfide and then deesterifying the intermediate 7-acylamino-3-methyl-3cephem-4-carboxylic acid ester.
摘要:
Novel organic phosphorosilicon compounds are silicate of Alpha -hydroxyphosphonate prepared by reacting a phosphorous acid triester, a carbonyl compound and a silicon compound containing at least one active chlorine atom and are effective as flameretarding agent for inflammable high polymers, particularly synthetic resins, synthetic rubbers and paints.
摘要:
3-DI(HYDROXYMETHYL) AMINO - 6(5-NITRO - 2-FURYLETHENYL)- 1,2,4-TRIAZINE IS VERY EFFECTIVE FOR PROMOTING THE GROWTH OF LIVESTOCK (FOR EXAMPLE, POULTRY, DUCKS, TURKEYS, SWINE, HORSES, CATTLE AND GOATS) WHEN GIVEN TO THE LIVESTOCK IN COMBINATION WITH CARRIERS SUCH AS FEEDS AND INERT MINERALS.
摘要:
PREPARATION OF TRI-SUBSTITUTED HYDROCARBYL PHOSPHATES, BY REACTING DIHYDROCARBYLCHLOROPHOSPHATES WITH ALCOHOLS IN THE PRESENCE OF CAUSTIC ALKALIS, SUCH AS CAUSTIC SODA AND CAUSTIC POTASH, ETC., WHEREBY THE HYDROEN CHLORIDE FORMED SIMULTANEOUSLY IS NEUTRALIZED QUICKLY WITH THE CAUSTIC ALKALI. ACCORDING TO THIS PROCESS, IT IS POSSIBLE NOT ONLY TO PREVENT THE DECOMPOSITION OF DIHYDROCARBYLCHLOROPHOSPHATES BUT ALSO TO SUPPRESS THE SIDE REACTION REPRESENTED BY THE EQUATION:
(RO)3PO+HCL-->(RO)2P(O)OH+RIL
WHEREIN R IS AN ALKYL GROUP. THE COMPOUNDS PRODUCED BY THE INVENTION ARE USEFUL AS ADDITIVES FOR GASOLINE, PLASTICIZERS FOR THERMOPLASTIC RESINS AND FLAME RETARDING AGENTS FOR RIGID POLYURETHANE FOAM, POLYESTER RESIN, ETC.