The acetonation of methyl 5-C-methoxy-beta-beta-d-galactopyranoside (1a), masked bis-glycoside form of L-arabino-hexos-5-ulose, with a large excess of 2,2-dimethoxypropane and catalytic amounts of p-toluenesulfonic acid gives a mixture of five acetonides. The most abundant isolated product was the mixed acetal methyl 6-O-(1-methoxy-1-methylethyl)-3,4-O-isopropylidene-5-C-methoxy-beta-d- galactopyranoside (44% yield).
The acetonation of methyl 5-C-methoxy-beta-D-galactopyranoside with 2,2-dimethoxypropane
CATELANI, GIORGIO;D'ANDREA, FELICIA;
1998-01-01
Abstract
The acetonation of methyl 5-C-methoxy-beta-beta-d-galactopyranoside (1a), masked bis-glycoside form of L-arabino-hexos-5-ulose, with a large excess of 2,2-dimethoxypropane and catalytic amounts of p-toluenesulfonic acid gives a mixture of five acetonides. The most abundant isolated product was the mixed acetal methyl 6-O-(1-methoxy-1-methylethyl)-3,4-O-isopropylidene-5-C-methoxy-beta-d- galactopyranoside (44% yield).File in questo prodotto:
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