Zobrazeno 1 - 10
of 19
pro vyhledávání: '"K. G. Ryabova"'
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 26:744-750
The complexes BF3-2CH3CH2COOH and BF3·2CH3COOH and the system 3BF3·2CH2ClCOOH-BF3·2CH3-COOH are active and stable catalysts of the carbonylation reaction (80–100°, pCO=100 atm) of tertiary and secondary alcohols of aliphatic and cyclic structur
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 27:913-918
An equimolar mixture of a normal (or cyclic) alkene and an alkene with a branch at the double bond (or a tertiary alcohol) in the presence of the BF3·H2O -liquid-SO2 catalytic system under 1 atm of CO at a temperature of −30 to −40°C undergoes
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 26:2165-2168
The carbonylation of olefins, with branching at the double bond, and of tertiary alcohols with CO at −30° and atmospheric pressure, in the presence of the catalyst system: BF3· H2O-liquid SO2, leads to the formation of mixtures of α,α-dialkylal
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 25:1264-1267
BF3 Complexes with acetic or propionic acid are highly active and stable catalysts for the carbonylation of olefins and alcohols and may be used repeatedly without lowering the initial activity.
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 28:784-790
1. The most active and selective catalysts for carbonylation of L-menthol, D,L-menthol, p-menthene, and 2,6-dimethyl-2,7-octadiene are BF3·2C2H5COOH, BF3·2CH3COOH, BF3·2CH2C1COOH, BF3·2CH2C1COOH, and BF3·2CH2C1COOH-BF3·2CH3COOH (3∶1). 2. The
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 22:1760-1763
1. Cyclic glycol esters of trialkylcarbinylboric acids were synthesized from trialkylboranes and carbon monoxide in 60–70% yield, while tertiary alcohols were obtained by their oxidation. 2. The addition of small amounts of sodium metal changed the
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 24:371-373
Olefins with branching at the double bond, and secondary and tertiary alcohols are carbonylated at atmospheric pressure and 25° in the presence of the catalyst system composed of the Cu(I)-CO and (BF3·H2O)·2(BF3·H3PO4) complexes to giveα,α-dime
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 27:96-98
The 3BF3·2CH2C1COOH+BF3-2CH3COOH system effectively catalyzes the selective carbonylation of propylene and n-butylenes. At 95–105°C and a CO pressure of 200 atm, with an equimolar ratio catalyst∶olefin∶ water, propylene or mixed n-butylenes g
Publikováno v:
Bulletin of the Academy of Sciences, USSR Division of Chemical Science. 15:1745-1747
1. The reactions of primary alkylmagnesium halides with carbon monoxide under pressure lead to the synthesis of olefins containing one carbon atom more than the doubled radical from the organomagnesium compound and with a double bond in the central p
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 21:1939-1941