摘要:
This invention relates to novel thiazolineazetidinone-type compounds represented by the formula ##STR1## wherein R represents a hydrogen atom, alkyl group, alkyl group replaced with halogen atoms, methyl group replaced with substituted or unsubstituted phenyl groups, methyl replaced with halogen atoms, or trialkylsilyl group and Z represents O or Cl.sub.2.
摘要:
A process for preparing 2-cyclopentenone derivative represented by the formula ##STR1## wherein A is ##STR2## and R.sub.2 is lower straight-chain or branched-chain alkyl, alkenyl or aralkyl, and perfume composition containing the derivative.
摘要:
A cyclopentanol derivative represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are lower straight-chain or branched-chain alkyl, alkenyl or aralkyl, and R.sub.4 is 2-pentenyl or 2-pentynyl, and process for preparing the same.
摘要:
Disclosed are 2.beta.-substituted-methylpenicillanic acid compounds of the formula ##STR1## wherein n is 0, 1 or 2; and ##STR2## is monocyclic or bicyclic heterocyclic ring group which has 2 to 4 nitrogen atoms as hetero atom in its ring structure and which may be optionally substituted with alkyl, alkoxycarbonyl, phenyl, formyl or benzyloxycarbonyl optionally having alkyl, nitro or a halogen atom on the benzene ring, with the proviso that said heterocyclic ring group is not 1,2,3-triazol-1-yl; or salts or esters thereof.These compounds are useful as .beta.-lactamase inhibitor.
摘要:
This invention provides a process for preparing a thiazolidine compound of the formula ##STR1## wherein R.sup.1 represents a hydrogen atom, alkyl group, aralkyl group, aryl group or aryloxymethyl group, and R.sup.2 represents a hydrogen atom or a group ##STR2## wherein R.sup.3 represents a hydrogen atom, alkyl group, halogenated alkyl group, benzyl group or silyl group, and X represents a hydrogen atom, halogen atom, hydroxy group, alkoxy group or acyloxy group, the process comprising electrolyzing a thiazoline compound represented by the formula ##STR3## wherein R.sup.1 and R.sup.2 are as defined above, in a mixture comprising a perchloric acid aqueous solution and an organic solvent.
摘要:
A process for producing a tetraalkylthiuram disulfide which comprises electrolytically oxidizing a dialkylammonium dialkyldithiocarbamate having the formula ##STR1## wherein each R represents an alkyl group having from 1 to 4 carbon atoms, in the presence or absence of a supporting electrolyte to produce a tetraalkylthiuram disulfide, the electrolytic oxidation being carried out in one or more solvents which dissolve at least one of the starting dialkylammonium dialkyldithiocarbamate and the resulting tetraalkylthiuram disulfide.
摘要:
A process for preparing a 2.beta.-substituted-methylpenicillin compound of the formula ##STR1## wherein --N Y is an optionally substituted heterocyclic group containing 2 to 4 nitrogen atoms as the hetero atom in the ring structure, and R.sub.1 is a penicillin carboxyl protecting group, the process comprising reacting an azetidinonedisulfide compound of the formula ##STR2## wherein R.sub.1 is as defined above and R is a substituted or unsubstituted heterocyclic group with a nitrogen-containing heterocyclic compound of the formula ##STR3## wherein ##STR4## is as defined above in the presence of a metal compound.
摘要:
2-Substituted-cyclopentanone derivatives represented by the formula ##STR1## are prepared by subjecting a 2-benzothiazolylsulfenamide derivative represented by the formula ##STR2## and cyclopentanone to condensation reaction, or by reacting the resulting condensation product with a hydrocarbon halide represented by the formulaR.sub.1 X.
摘要:
An object of the invention is to provide a process for preparing a 3-substituted cephem compound from an allenyl-.beta.-lactam compound which can be easily produced from an inexpensive penicillin compound by a simple reaction procedure.The process of the invention comprises reacting an allenyl-.beta.-lactam compound with an organohalogen compound in the presence of a metal having a standard oxidation-reduction potential of -0.3 (V/SCE) or less in an amount at least equimolar with the allenyl-.beta.-lactam compound and 0.0001 to 0.5 mole, per mole of the allenyl-.beta.-lactam compound, of a metal compound having a higher standard oxidation-reduction potential than said metal.
摘要:
The present invention provides a process for preparing a 1,1-disubstituted ethylene derivative of the formula ##STR1## which comprises reacting lead with a carbinol derivative of the formula ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, X, Y, m and n are defined in the specification. The reaction is conducted more advantageously in the presence of a metal having higher ionization tendency than lead.