Synlett

Hydrogenation and hydrogenolysis with Pd/C in poly (ethylene glycol)(PEG): A practical and recyclable medium

S Chandrasekhar, T Shyamsunder, G Chandrashekar…

Index: Chandrasekhar; Shyamsunder; Chandrashekar; Narsihmulu Synlett, 2004 , # 3 p. 522 - 524

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Citation Number: 13

Abstract

We initially examined the deprotection of benzyl ether (Scheme [1] , entry 1a in Table [1] ; 500 mg, 2 mmol), 2 g of PEG (400) and 10% Pd/C (20 mg, 0.02 mmol) were stirred under hydrogen balloon for 6 hours. Anhydrous diethyl ether (5 mL) was added, the mixture stirred for five minutes and the reaction was allowed to settle for 5 minutes. Cooling of the contents in an acetone-dry ice bath led to precipitation of solid PEG and catalyst. This technique allowed us to decant ...