A novel synthetic method for mixed acetals (acetyl methyl acetals) by electrolysis of hemithioacetals derived from methoxy- (phenylthio)methane is newly developed. Synthetic application of these mixed acetals as an aldehyde equivalent is also demonstrated.
Process for preparing substituted oxyacetaldehydes and acetals thereof
申请人:International Flavors & Fragrances Inc.
公开号:US04205186A1
公开(公告)日:1980-05-27
A process is described for the preparation of substituted oxyacetaldehydes and acetals thereof according to the reaction sequence: ##STR1## wherein R.sub.1 and R.sub.2 are each lower alkyl or R.sub.1 and R.sub.2, taken together form a lower alkylene group; wherein R.sub.3 is alkyl, alkenyl or alkadienyl and X is halogen selected from the group consisting of chlorine and bromine, the reaction (i) being carried out (1) using a "phase transfer agent" and (2) in a two phase system.
Pyrazolopyridine compounds, their preparation and use
申请人:Yoshitomi Pharmaceutical Industries, Ltd.
公开号:EP0254241A1
公开(公告)日:1988-01-27
A pyrazolopyridine compound of the formula:
or a salt thereof, wherein each symbol is as defined in the specification.
Said compounds exhibit antiinflammatory, analgesic, antipyretic, antiallergic, antiarthritic, antirheumatic activities or inhibitory activities on platelet aggregation.
(DE) Durch Spaltung von Octyl- und Octadienylethern des Glycerins mit Alkaliperiodaten werden substituierte Oxyacetaldehyde erhalten, die als Riechstoff verwendet werden können.(EN) By splitting octyle and octadienyl ethers of glycerine with alkali periodates, substituted oxyacetaldehydes are produced that are useful as perfumes.(FR) On produit, par clivage des éthers d'octyle et d'octadiényle de la glycérine avec des périodates alcalins, des oxyacétaldéhydes substitués utilisables comme parfums.