Rhodium-catalyzed carbonylation of alkynes in the presence of alcohols: Selective synthesis of 3-alkoxycarbonylindanones
Rhodium-catalyzed cyclic carbonylation of alkynes 1 in the presence of alcohols gives selectively 3-alkoxycarbonylindanones 2 which are derived from 1, one molecule of alcohol and two molecules of carbon monoxide.
Rhodium Carbonyl Catalyzed Carbonylation of Unsaturated Compounds. 2. Synthesis of 5-Alkoxy-2(5H)-furanones by the Carbonylation of Acetylenes in Alcohol
The carbonylation of diphenylacetylene (1a) in ethanol in the presence of Rh4(CO)12/Na2CO3 as a catalyst gave 5-ethoxy-3,4-diphenyl-2(5H)-furanone (3b) in a 72percent yield, together with 3-(ethoxycarbonyl)-2-phenylindanone (11percent) and diethyl 2,3-dip
Mise, Takaya,Hong, Pangbu,Yamazaki, Hiroshi
p. 238 - 242
(2007/10/02)
RHODIUM CARBONYL-CATALYZED CARBONYLATION OF ACETYLENES IN THE PRESENCE OF OLEFINS AND PROTON DONORS. SYNTHESIS OF 5-ALKYL-2(5H)-FURANONES.
Rhodium carbonyl-catalyzed reactions of internal acetylenes with ethylene and CO in protic solvents, e.g., ethanol, gave 3,4-disubstituted-5-ethyl-2(5H)-furanones in good yields.By using propylene or methyl acrylate instead of ethylene, small amounts of 5-n-/isopropyl-2(5)H-furanones or 5--2(5H)-furanone were obtained.
Hong, Pangbu,Mise, Takaya,Yamazaki, Hiroshi
p. 989 - 992
(2007/10/02)
RHODIUM CARBONYL-CATALYZED CARBONYLATION OF ACETYLENES IN ALCOHOL. SYNTHESIS OF 5-ALKOXY-2(5H)-FURANONES.
Reactions of internal acetylenes with CO in alcohols gave 5-alkoxy-3,4-disubstituted-2(5H)-furanones in good yields in the presence of rhodium catalysts containing basic alkali metal salts, e.g., Rh4(CO)12 or RhCl2*3H2O in combination with sodium carbonat
Mise, Takaya,Hong, Pangbu,Yamazaki, Hiroshi
p. 993 - 996
(2007/10/02)
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