Cyclization reactions of N1-(glycopyranosylamino) guanidines
摘要:
Acetylation of N-1-(aldopyranosylamino)guanidines 2-4 with D-gluco, D-galacto, and L-arabino configuration gives rise to N-1-per(O-acetylglycopyranosylamino)-N-1, N-2, N-3-triacetylguanidines 5-7 in good yields, as already stated by Feather and coworkers [Carbohydr. Res., 267 (1995) 17-25] for the gluco compound. The acylaminoguanidines prepared have been cyclized under mild conditions (boiling in ethanol or treatment with cold 0.1 M sodium methylate solution) to afford 3-amino-N-1-glycopyranosyl-5-methyl-1H-1,2,4-triazoles. The structure of these pyranosyl nucleosides 9, 10, 12-14 is discussed using H-1 and C-13 NMR spectroscopy and mass spectrometry. (C) 1997 Elsevier Science Ltd.
Acetylation of N-1-(aldopyranosylamino)guanidines 2-4 with D-gluco, D-galacto, and L-arabino configuration gives rise to N-1-per(O-acetylglycopyranosylamino)-N-1, N-2, N-3-triacetylguanidines 5-7 in good yields, as already stated by Feather and coworkers [Carbohydr. Res., 267 (1995) 17-25] for the gluco compound. The acylaminoguanidines prepared have been cyclized under mild conditions (boiling in ethanol or treatment with cold 0.1 M sodium methylate solution) to afford 3-amino-N-1-glycopyranosyl-5-methyl-1H-1,2,4-triazoles. The structure of these pyranosyl nucleosides 9, 10, 12-14 is discussed using H-1 and C-13 NMR spectroscopy and mass spectrometry. (C) 1997 Elsevier Science Ltd.