Process for making a mixture of L-glucose and L-mannose

Details Process for making a mixture of L-glucose and L-mannose Process for making a mixture of L-glucose and L-mannose

1984-08-13

1986-04-08

Brown, Johnnie R.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536124, C07H 100

Patent

active

045814473

ABSTRACT:
A process converting L-arabinose to L-fructose in high yield and selectivity is described. The success of the process depends upon careful pH control during cyanohydrin formation from L-arabinose and its subsequent selective hydrogenation, the choice of hydrogenation conditions, including catalyst, temperature, and pressure, to selectively convert the cyano group to the imine group with subsequent hydrolysis to the aldehyde group without any significant hydrogenation of the latter, and upon the use of performing reactions, including base catalyzed isomerization, in an atmosphere of an inert gas.

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Speck, Jr., "Advances in Carbohydrate Chemistry", vol. 13, 1958, pp. 63-69.
M. L. Wolfrom and A. Thompson, J. Am. Chem. Soc., 68, 791, (1946).

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