An Isofagomine Analogue with an Amidine at the Pseudoanomeric Position

[摘要]：(3R,4R,5R)-2-Imino-3,4-dihydroxy-5-hydroxymethylpiperidine hydrocloride or Isofagomidine was synthesized from D-arabinose in 12 steps and an overall yield of 9.9%. The synthesis proceeded by introduction of an aminomethyl group In the 4-position of D-arabinose and conversion of C-1 into a nitrile. The key step in the synthesis was a copper-catalyzed cyclization of aminonitrile to amidine. Isofagomidine was a potent alpha-mannosidase inhibitor (K-i = 0.75 mu M).

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