Carbon-branched carbohydrate chirons: practical access to both enantiomers of 2-C-methyl-ribono-1,4-lactone and 2-C-methyl-arabinonolactone
摘要:
Readily crystallized 2-C-methyl-D-ribono-1,4-lactone is formed in a one-pot procedure from D-glucose without any protecting groups by treatment with dimethylamine to give an Amadori ketose and then with aqueous calcium hydroxide in yields of approximately 25%; 2-C-methyl-L-ribono-1,4-lactone is similarly produced from L-glucose. 3,4-O-Isopropylidene-2-C-methyl-D-arabinono-1,5-lactone and 2-C-methyl-D-arabinono-1,4-lactone were prepared in a combined 60% yield by the Kiliani reaction of sodium cyanide with a protected 1-deoxy-D-ribulose derived from D-erythronolactone; the enantiomeric arabinonolactones are similarly available from L-erythronolactone. (C) 2008 Elsevier Ltd. All rights reserved.
Carbon-branched carbohydrate chirons: practical access to both enantiomers of 2-C-methyl-ribono-1,4-lactone and 2-C-methyl-arabinonolactone
摘要:
Readily crystallized 2-C-methyl-D-ribono-1,4-lactone is formed in a one-pot procedure from D-glucose without any protecting groups by treatment with dimethylamine to give an Amadori ketose and then with aqueous calcium hydroxide in yields of approximately 25%; 2-C-methyl-L-ribono-1,4-lactone is similarly produced from L-glucose. 3,4-O-Isopropylidene-2-C-methyl-D-arabinono-1,5-lactone and 2-C-methyl-D-arabinono-1,4-lactone were prepared in a combined 60% yield by the Kiliani reaction of sodium cyanide with a protected 1-deoxy-D-ribulose derived from D-erythronolactone; the enantiomeric arabinonolactones are similarly available from L-erythronolactone. (C) 2008 Elsevier Ltd. All rights reserved.
Carbon-branched carbohydrate chirons: practical access to both enantiomers of 2-C-methyl-ribono-1,4-lactone and 2-C-methyl-arabinonolactone
作者:Kathrine V. Booth、Filipa P. da Cruz、David J. Hotchkiss、Sarah F. Jenkinson、Nigel A. Jones、Alexander C. Weymouth-Wilson、Robert Clarkson、Thomas Heinz、George W.J. Fleet
DOI:10.1016/j.tetasy.2008.10.013
日期:2008.10
Readily crystallized 2-C-methyl-D-ribono-1,4-lactone is formed in a one-pot procedure from D-glucose without any protecting groups by treatment with dimethylamine to give an Amadori ketose and then with aqueous calcium hydroxide in yields of approximately 25%; 2-C-methyl-L-ribono-1,4-lactone is similarly produced from L-glucose. 3,4-O-Isopropylidene-2-C-methyl-D-arabinono-1,5-lactone and 2-C-methyl-D-arabinono-1,4-lactone were prepared in a combined 60% yield by the Kiliani reaction of sodium cyanide with a protected 1-deoxy-D-ribulose derived from D-erythronolactone; the enantiomeric arabinonolactones are similarly available from L-erythronolactone. (C) 2008 Elsevier Ltd. All rights reserved.