摘要:
Hydroxyalkyl-substituted aminoalkynes of the general formula I ##STR1## where at least one of the substituents R.sup.1, R.sup.4 or R.sup.5 is hydroxyalkyl are prepared in a reaction with heterogeneous catalysis.
摘要:
A process for the preparation of butyrolactones of the formula I ##STR1## where the substituents R.sup.1 and R.sup.2 are hydrogen, alkyl or hydroxyalkyl groups, or aryl and trialkylsilyl groups, if appropriate carrying inert: substituents, is described in which an alkyne of the formula IIR.sup.1 --C.tbd.C--R.sup.2 IIwhere the substituents have the meanings indicated above, is reacted under reducing conditions at elevated pressure and elevated temperature with carbon monoxide CO and hydrogen in the presence of a transition metal catalyst or with carbon monoxide and water in the presence of a transition metal catalyst.
摘要:
N-Hydroxyalkyl-substituted aminoalkynes of the formula I ##STR1## are prepared by reacting an alkyne with a 1-oxa-3-azaheterocyclo-alkane in a reaction with heterogeneous catalysis by a catalyst which comprises a compound of a metal of the first or second sub-group.
摘要:
The preparation of monovinyl ethers of the general formula I ##STR1## in which A stands for a chemical bond or for a methylene or ethylene group, the radicals R.sup.1 and R.sup.2 independently stand for hydrogen, alkyl, cycloalkyl, or aryl groups or R.sup.1 and R.sup.2 together form a C.sub.3 -C.sub.5 alkylene bridging member, by the reaction of a diol of the general formula II ##STR2## in which the variables have the above meanings, with acetylene in the presence of a base, in which the reaction is carried out at 150.degree.-250.degree. C. under an acetylene partial pressure of 5-25 bar until 40-80% of the diol has been converted, at which point the reaction is stopped and the monovinyl ether of the formula I is isolated.
摘要:
A process for preparing N-alkenylazoles of the general formula I ##STR1## where X is CH--R.sup.6 or nitrogen,R.sup.1 and R.sup.2 are hydrogen or C.sub.1 - to C.sub.8 -alkyl,R.sup.3,R.sup.4,R.sup.5 and R.sup.6 are hydrogen, C.sub.1 - to C.sub.40 -alkyl, C.sub.2 - to C.sub.40 -alkenyl, C.sub.3 - to C.sub.20 -cycloalkyl, C.sub.4 - to C.sub.20 -alkylcycloalkyl, C.sub.4 - to C.sub.20 -cycloalkylalkyl, aryl, C.sub.7 - to C.sub.20 -alkylaryl or C.sub.7 - to C.sub.20 -aralkyl, or aryl, C.sub.7 - to C.sub.20 -alkylaryl or C.sub.7 - to C.sub.20 -aralkyl which are mono- to pentasubstituted by C.sub.1 - to C.sub.8 -alkyl, C.sub.1 - to C.sub.8 -alkoxy or halogen, or R.sup.3 and R.sup.4 or R.sup.4 and R.sup.5 or R.sup.5 and R.sup.6 together are a C.sub.2 - to C.sub.10 -alkylene chain which is unsubstituted or mono- to hexasubstituted by C.sub.1 - to C.sub.8 -alkylby reaction of azoles of the general formula II ##STR2## where X, R.sup.3, R.sup.4 and R.sup.5 have the abovementioned meanings, with an alkenyl carboxylate of the general formula III ##STR3## where R.sup.1 and R.sup.2 have the abovementioned meanings and R.sup.7 is hydrogen, C.sub.1 - to C.sub.40 -alkyl, C.sub.3 - to C.sub.20 -cycloalkyl, C.sub.4 - to C.sub.20 -alkylcycloalkyl, aryl, C.sub.7 - to C.sub.20 -alkylaryl, C.sub.7 - to C.sub.20 -aralkyl, or aryl or C.sub.7 - to C.sub.20 -aralkyl which is mono- to trisubstituted by C.sub.1 - to C.sub.8 -alkyl, at from 0.degree. to 180.degree. C. and from 0.01 to 10 bar, which comprises carrying out the reaction in the presence of a base and of a quaternary salt, is described.
摘要:
The process for preparing alkynediols of the formula (I) R1R2C(OH)—C≡C—C(OH)R1R2 (I) where R1, R2 are each independently H, or a C1-20-hydrocarbon radical which may be substituted by one or more C1-6-alkyls and/or be interrupted by nonadjacent heteroatoms and/or contain C—C double or triple bonds, by reacting compounds of the formula (II) R1—C(═O)—R2 (II) with acetylene in a polar aprotic solvent is carried out in the presence of basic alkali metal salts as catalysts.
摘要:
A process for preparing N-alkyl-substituted aminoalkynes by reacting an alkyne with a carbonyl compound and an amine with heterogeneous catalysis in which an unsupported copper acetylide derived from malachite is used as the catalyst. The N-alkyl-substituted aminoalkyne have a wide variety of uses including their use as precursors for pharmaceuticals, their use in electroplating processes and their use as corrosion inhibitors.
摘要:
A process for preparing 2-alkynoic esters of the general formula (I),R.sup.1 --O--CO--C.tbd.C--R.sup.2 (I)in which R.sup.1 and R.sup.2 independently are C.sub.1-16 -alkyl, C.sub.6-12 -aryl, C.sub.7-12 -aralkyl or C.sub.7-12 -alkylaryl radicals, and R.sup.2 can also be hydrogen,by reacting a chloroformate of the general formula (II),R.sup.1 --O--CO--Cl (II)with an alkyne of the general formula (III),R.sup.2 --C.tbd.C--H (III)is carried out in the presence of a Pt and/or Pd complex which has phosphine ligands and/or phosphite ligands as catalyst.
摘要:
Dyes of the formulaQ-X=HetwhereX is nitrogen or CH,Q is a 5- or 6-membered carbocyclic or heterocyclic radical and Het is a radical of the formula ##STR1## where Y is oxygen, sulfur, imino, C.sub.1 -C.sub.4 -alkylimino, substituted or unsubstituted phenylimino or the radical of an acidic-CH compound, A is oxygen or a radical of the formula C--U, where U is as defined in the description part, and E --is oxygen, sulfur, selenium, imino, C.sub.1 -C.sub.4 -alkylimino or substituted or unsubstituted phenylimino,are useful for thermal transfer and for dyeing or printing synthetic materials.
摘要:
A process for the hydrogenation of an aromatic compound, in which at least one hydroxyl group is attached to an aromatic core, or an aromatic compound, in which at least one amino group is attached to an aromatic core, in the presence of a catalyst containing, as active metal, ruthenium and optionally one or more other Group IB, VIIB, or VIIIB metals, applied to a macroporous support.