We present a general, practical, and efficient approach to 5- and 6-membered organic carbonates by palladium-catalyzed direct oxidative carbonylation of 1,2- and 1,3 diols,respectively.Reactions were carried out at 100 C in N,N-dimethylacetamideas the solvent under 20 atm (at 25 C; 1 atm=101.3 kPa) of a 4:1 v/v CO/air mixture in the presence of 0.5–2 mol% of PdI2 and KI (KI/PdI2 molar ratio=10). Excess dehydrating agent, such as trimethyl orthoacetate, was necessary in several cases to obtain appreciable results. The method could also be appliedto the synthesis of a high-value-added glycerol carbonatefrom glycerol, a readily available raw material. When applied to a-d-glucose, a double carbonylation process took place, with direct formation of a-d glucofuranose 1,2:5,6 dicarbonate.

A general and expedient synthesis of 5- and 6-membered cyclic carbonates by palladium-catalyzed oxidative carbonylation of 1,2- and 1,3-diols

GABRIELE, Bartolo;MANCUSO R;VELTRI, Lucia;
2011-01-01

Abstract

We present a general, practical, and efficient approach to 5- and 6-membered organic carbonates by palladium-catalyzed direct oxidative carbonylation of 1,2- and 1,3 diols,respectively.Reactions were carried out at 100 C in N,N-dimethylacetamideas the solvent under 20 atm (at 25 C; 1 atm=101.3 kPa) of a 4:1 v/v CO/air mixture in the presence of 0.5–2 mol% of PdI2 and KI (KI/PdI2 molar ratio=10). Excess dehydrating agent, such as trimethyl orthoacetate, was necessary in several cases to obtain appreciable results. The method could also be appliedto the synthesis of a high-value-added glycerol carbonatefrom glycerol, a readily available raw material. When applied to a-d-glucose, a double carbonylation process took place, with direct formation of a-d glucofuranose 1,2:5,6 dicarbonate.
2011
carbonylation; diols; palladium; cyclic carbonates; heterocycles
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/157855
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