Raylo Chemicals

The silicic acid used for column chromatography and the Amberlite resin were Silicar CC-7 100-200 mesh purchased from Mallinckrodt Chemical Works, St. Louis, Mo. The 5% palladium on charcoal catalyst was purchased from Engelhard Industries Ltd., Newark, N. J. The tri-O-acetyl-D-glucal and the tri-O-acetyl-D-galactal (as a 70% solution in benzene) were purchased from Raylo Chemicals Limited, Edmonton, Alberta. 

Current address Raylo Chemicals, Edmonton, Alberta, Canada T6C 4A9... 

The sugar derivatives which are appropriate for use in synthesis must either be available commercially or be prepared readily from cheap precursors. Apart from the usual chemical suppliers, Pfanstiehl (Waukegan, Illinois, U.S.A.) and Raylo (Edmonton, Alberta, Canada) carry excellent stocks of sugars and their derivatives. Many of the latter can frequently be prepared rapidly and economically, and for this purpose the series Methods in Carbohydrate Chemistry (Academic Press), particularly volumes 1,2 and 6, is unsurpassed. 

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