摘要:
The present invention relates to a continuous process for preparing alkyl 3,3-dialkoxy-propionates of the formula (RO)2CHCH2CO2R, wherein R is C1-6 alkyl, by reacting ketene with an ortho formate of formula (RO)3CH in the presence of an acidic catalyst, characterized in that the reaction is carried out in a loop reactor.
摘要翻译:本发明涉及在存在下通过使乙烯酮与式(RO)3CH的原甲酸酯反应来制备式(RO)2 CHCH 2 CO 2 R的烷基3,3-二烷氧基 - 丙酸酯,其中R为C 1-6烷基的连续方法 的酸性催化剂,其特征在于反应在环管反应器中进行。
摘要:
Process for removing hydrogen cyanide from ethanedinitrile by contacting hydrogen cyanide-containing ethanedinitrile with an organic reagent under formation of a covalent bond.
摘要:
The present invention relates to novel tricyanoborates of the general formula Catn+[B(CN)3(XR1)]—n, wherein R1 is C1-6 alkyl, C2-6 alkenyl, C6-10 aryl or benzyl; X is oxygen or sulfur; and Catn+ is a cation with n being 1 or 2, which is selected from the group consisting of an inorganic cation and an organic cation; and also their preparation and use.
摘要:
The present invention relates to novel tricyanoborates of the general formula Catn+ [B(CN)3(XR1)]—n, wherein R1 is C1-6 alkyl, C2-6 alkenyl, C6-10 aryl or benzyl; X is oxygen or sulfur; and Catn+ is a cation with n being 1 or 2, which is selected from the group consisting of an inorganic cation and an organic cation; and also their preparation and use.
摘要:
The present invention relates to a process for the selective preparation of acetaldehyde, characterized in that acrolein and one or more ammonium salts dissolved in water are reacted continuously under high pressures and at temperatures of 300-400° C.
摘要:
Process for removing hydrogen cyanide from ethanedinitrile by contacting hydrogen cyanide-containing ethanedinitrile with an organic reagent under formation of a covalent bond.
摘要:
The present invention relates to a process for the selective preparation of acetaldehyde, characterized in that acrolein and one or more ammonium salts dissolved in water are reacted continuously under high pressures and at temperatures of 300-400° C.
摘要:
The present invention relates to a process for the selective preparation of 3-methylpyridine, characterized in that acrolein and one or more ammonium salt(s) dissolved in water are reacted continuously under high pressures and at temperatures of 200-400° C.
摘要:
A method for the production of 6,6,6-trihalo-3,5-dioxohexanic acid esters of formula (I): in addition to the enols thereof and E and Z isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.
摘要:
A method for the production of 6,6,6-trihalo-3,5-dioxohexanoic acid esters of formula (I): in addition to the enols thereof and E and Z isomers, wherein X independently represents fluorine, chlorine or bromine and R1 represents alkyl, cycloalkyl, aryl or aralkyl. A method for the production of enol ethers of formula (Ib): and the enols thereof (E and Z isomers) wherein X and R1 have the above-mentioned meanings.