Deoxyiminoalditols from aldonolactones--V. Preparation of the four stereoisomers of 1,5-dideoxy-1,5-iminopentitols. Evaluation of these iminopentitols and three 1,5-dideoxy-1,5-iminoheptitols as glycosidase inhibitors.

Abstract:

:The four stereoisomeric 1,5-dideoxy-1,5-iminopentitols with D-arabino-(D-lyxo-) (3), ribo- (9), L-lyxo (L-arabino-) (13) and xylo-(18) configurations were synthesized. The corresponding aldonolactones (1, 7 and 11) or aldonic acid ester (15b) having a leaving group at C-5 gave by reaction with aqueous ammonia, the 5-amino-5-deoxy-1,5-lactams, 2, 8, 12 and 17, respectively. Reduction of the lactam function using sodium borohydride/acetic or trifluoroacetic acid, or borane dimethyl sulfide complex yielded the iminopentitols. The compounds 3, 9, 13 and 18, together with the three 1,5-dideoxy-1,5-iminoheptitols 19,20 and 21 were tested for inhibition of the glycosidase activities present in an extract from human liver. Compound 18 was a potent and 19 a moderately good inhibitor of beta-glucosidase. Compound 3 together with 19, 20 and 21, all having D-arabino-configuration at the hydroxy-substituted carbon atoms, were good inhibitors of alpha-L-fucosidase.

journal_name

Bioorg Med Chem

authors

Godskesen M,Lundt I,Madsen R,Winchester B

doi

10.1016/s0968-0896(96)00167-8

subject

Has Abstract

pub_date

1996-11-01 00:00:00

pages

1857-65

issue

11

eissn

0968-0896

issn

1464-3391

pii

S0968089696001678

journal_volume

4

pub_type

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