Abstract:
Methods of converting a fluorinated compound into a fluorinated acyl fluoride or derivative thereof, the method including reacting the fluorinated compound with a catalytic amount of at least one transition metal compound and an oxygen-containing compound to form the fluorinated acyl fluoride or derivative thereof. Compounds formed using such methods are also included, including for example and derivatives thereof, or combinations thereof.
Abstract:
The present invention relates to a process for preparing alkenone, in particular alkenone ethers, by reacting a carboxylic acid halide with a vinyl ether and eliminating hydrogen halide from said precursor to form the alkenone.
Abstract:
The invention relates to a process for preparing a halogenated precursor of an alkenone, which comprises reacting a carboxylic acid halide with a vinyl ether in a liquid reaction medium under turbulent conditions. The invention also relates to a process for preparing an alkenone, by eliminating hydrogen halide from said precursor to form the alkenone.
Abstract:
Disclosed is a protective agent for a hydroxyl group or a carboxyl group, which is represented by the general formula (0) below (wherein X 1 represents a hydrogen atom and X 2 represents a halogen atom, or alternatively X 1 in combination with X 2 represent a bond; R 1 and R 2 independently represent a substituted or unsubstituted alkyl or the like; A represents an oxygen atom or a sulfur atom; and R 3 represents an alkyl wherein a group having an oxygen atom and/or a sulfur atom is substituted or the like). (0)
Abstract translation:公开了由下述通式(0)表示的羟基或羧基保护剂(其中X 1表示氢原子,X 2 O 2) 代表卤素原子,或者与X 2结合的X 1代表键; R 1和R 2 2 >独立地表示取代或未取代的烷基等; A表示氧原子或硫原子; R 3表示其中具有氧原子和/或硫原子的基团被取代的烷基 或类似物)。 (0)
Abstract:
Haloalkenone ethers can be produced by the attachment of carboxylic acid halides to a vinyl ether and by the expulsion of hydrogen halide. The invention improves said method by carrying out the process without a base and/or in the presence of a stabiliser for the alkenone. Higher yields of the product can thus be obtained.
Abstract:
This invention relates to aliphatic carbonyl compounds of formula I wherein, their manufacture and their use in fragrance compositions.[insert formula I here]R1 to R4, X and Y have the meaning as described in the specification
Abstract:
The compounds of the invention are characterized by formulae (II) and (III) wherein subscript p is the integer 2 or 3 and q can have the value zero or 1, provided that p+q=3. Said compounds are obtained from hex-3-yne-2,5-diol by a method consisting in reacting an ethylenic compound of formula (CH3)2C=C(H)n(CH3)m wherein subscript n is the integer 1 or 2 and m can have the value zero or 1 and wherein n+m=2, with hex-3-yne-2,5-diol, followed by oxydizing the acetylenic ether obtained by means of ruthenium tetroxyde. The compounds of formula (III) can be used as intermediates in the preparation of 4-hydroxy-2,5-dimethyl-3(2H)-furanone (Furaneol3).
Abstract:
Compounds of formula (I) wherein R is hydrogen, lower alkyl, halo, cyano, hydroxy, amino, lower alkylamino, -CH2NH2, -CH2OH or -COOR''; R' is hydrogen, lower cycloalkyl or lower alkyl; R'' is lower alkenyl, lower alkynyl, lower cycloalkyl, -(W)nY wherein W is straight or branched chain lower alkyl or lower alkenyl, n is 0 to 5, and Y is Ar, lower cycloalkyl, lower alkenyl, lower alkynyl, -COOZ wherein Z is lower alkyl, a compound of formula (II), or NAB wherein A and B are, independently, lower alkyl, benzyl or substituted benzyl, and Ar is 2, 3 or 4-pyridyl, pyridazinyl, pyrimidinyl, quinolyl, isoquinolyl, phthalazinyl, quinazolinyl, thiazolyl, phenyl, benzyl, furyl, tetrahydrofuryl or thienyl, unsubstituted or substituted with lower alkyl, lower alkoxy, halo, amino, or -CF3; R''' is -COOR'', a compound of formulas (III) and X is oxygen or nitrogen; or a pharmaceutically acceptable salt thereof, and their use in the treatment of impaired ventricular myocardial contractility. The compounds exhibit cardiotonic activity.