摘要:
A novel phenylalkanoic acid derivative represented by general formulae (I) or (II), a process for the production thereof, a method of separating optical isomers thereof, and an anti-inflammatory, analgesic or external preparation containing the same. In the said formulae, n represents an integer of 1 or 2; X represents halogen, alkoxy or nitro; R represents hydrogen or alkyl; and Z represents hydrogen or acyl.
摘要:
A (perfluoroalkyl)dibenzonium salt represented by the following general formula wherein R f represents a perfluoroalkyl group having 1 to 10 carbon atoms, A represents a sulfur or selenium atom, R¹ and R², independently from each other, represent a hydrogen atom or a nitro group, X ⊖ represents a conjugated base of Brönsted acid, and n is 0 or 1. The said compound is useful as a reagent for introducing a perfluoroalkyl group.
摘要:
Es wird die Herstellung von chiralen Enaminen der allgemeinen Formel und der entsprechenden Aldehyde beschrieben, worin die Substituenten R, R¹ und R² die in der Beschreibung angegebenen Bedeutungen haben. Diese Herstellung erfolgt durch Isomerisierung einer in E- oder Z-Form vorliegenden Verbindung der allgemeinen Formel mit einem Rhodium-diphosphinkomplex unter Zusatz eines achiralen Triarylphosphins und gewünschtenfalls Hydrolyse der erhaltenen Verbindung der Formel I zum entsprechenden Aldehyd.
摘要:
This invention relates to novel alpha-substituted α,β-unsaturated E- or Z-aldehydes, or isomer mixture thereof, of the formula (I) in which R1 and R2 may be identical or different and are each H or a hydrocarbon, in which the hydrocarbon may have one or more heteroatoms and R3 and R4 may be identical or different and are each a hydrocarbon, in which the hydrocarbon may have one or more heteroatoms, and R5 may be identical or different and is H or a hydrocarbon, in which the hydrocarbon may have one or more heteroatoms, to the use thereof, and to processes for their preparation. The invention further relates to the preparation of further intermediates for pharmaceuticals and to the preparation of the pharmaceuticals.
摘要:
Methods of the present invention for producing dibromofluorobenzene derivatives (compounds II) comprise Step 1, in which compounds (I) having the following general formula (I):
(wherein, R 1 and R 2 each independently represent a C 1-6 alkyl group) are reacted in a solvent with a brominating reagent.