摘要:
The compounds of the formula ##SPC1##In which R is lower alkyl, lower alkoxy or halo, x is an integer from 0 to 2, n is an integer from 0 to 3, Y is halo and R.sub.1 and R.sub.2 independently are hydrogen, lower alkyl, phenyl or substituted phenyl, or, together with the nitrogen atom, form a heterocyclic ring also containing up to one oxygen atom in the heterocycle. The compounds in which x is 0 are prepared by adding chlorine or bromine to a 1-arylthiomethanesulfonamide in the presence of pyridine to form the 1-arylthio-1, 1-dihalomethanesulfonamide. The compounds in which x is 1 or 2 is prepared by adding sodium hypochlorite or sodium hypobromite to a 1-(arylsulfinyl)methane-sulfonamide or a 1-(arylsulfonyl)methanesulfonamide to form the 1-(arylsulfinyl)-1,1-dihalomethanesulfonamide or 1-(arylsulfonyl)-1,1-dihalomethanesulfonamide, respectively. The compounds are useful as antimicrobial agents.
摘要:
The present invention relates to a novel process for preparing alkali metal salts of diformylamide and a novel crystalline form of sodium diformylamide.
摘要:
The present invention relates to a novel process for preparing (E)-1-amino-2-(fluoromethylene)-4-(p-fluorophenyl)butane, also known in the art as (E)-(p-fluorophenethyl)-3-fluoroallylamine, novel intermediates thereof, a novel process for the preparing (E)-2-(fluoromethylene)-4-(p-fluorophenyl)butan-1-ol, and a novel process for preparing alkali metal salts of diformylamide.
摘要:
Polymorphically pure terfenadine, 1-(p-tert-butylphenyl)-4-[4'-(.alpha.-hydroxydiphenylmethyl)-1'-piperidinyl]-butanol, is prepared by carefully controlled recrystallization methods.
摘要:
N-(5,7-Dibromo-1,3-benzoxathiol-2-ylidene)-N-methylmethanaminium bromide and the analogous diodo iodide, new compounds, are prepared by the thermal rearrangement of O-(2,4,6-tribromophenyl)-N,N-dimethylthiocarbamate and O-(2,4,6-triiodophenyl)-N,N-dimethylthiocarbamate. The first-named compound has antimicrobial utility. Both compounds are useful as starting materials for the preparation of bis-(3,5-dibromo-2-hydroxyphenyl)disulfide and 2,4-diiodo-6-mercaptophenol, respectively, by hydrolysis of the two first-named compounds with methanolic sodium hydroxide. Both the disulfide and the mercaptophenol compounds have antimicrobial utility.
摘要:
Compounds are prepared corresponding to the formula ##STR1## WHEREIN R represents hydrogen or methylenethiocyanate (--CH.sub.2 SCN) and each of R.sup.1 and R.sup.2 represents loweralkyl of 1 to 4 carbon atoms. Those compounds wherein R is methylenethiocyanate have been found to be active antimicrobial agents and those wherein R is hydrogen are useful as intermediates therefor.
摘要:
A method of operating a vehicle system including an internal combustion engine is disclosed, the method comprises separating a second fuel from a first fuel, the second fuel having a greater concentration of at least one component than the first fuel; combusting at least the first fuel at least during a first engine load; and combusting at least the second fuel at least during a second engine load higher than the first engine load.
摘要:
The present invention relates to a process for preparing a compound of formula (I): ##STR1## wherein R is C.sub.1 -C.sub.10 alkyl, phenyl or substituted phenyl, comprising treating a compound of formula (II): ##STR2## with bis(tributyltin) oxide in an organic solvent selected from the group consisting of o-xylene, m-xylene, p-xylene and mixed xylenes;and subsequently treating the reaction mixture with a compound of formula (III): ##STR3## wherein X is halogen and R is defined as above.