2-(Alkylamino. dialkylamino. arylamino)tetrahydropyrano[2.3-d]oxazoles are prepared in good yield by a one-pot three-step synthesis from O-unprotected beta-D-glucopyranosylamine, by its transformation into glucopyranosyl isothiocyanate in dioxane-water. coupling with amines, and reaction of the corresponding thioureas with yellow mercury (II) oxide in the same reaction medium. In the case of diethylamine prolonged reaction time during the last step, with an extra portion of yellow HgO led to N.N-diethyl-N'-(beta-D-glucopyranosyl)urea in a one-pot four-step synthesis. 2-(beta-D-Glucopyranosylamino)tetrahydro-pyrano[2,3-d]oxazole. an analogue of trehazolin. is obtained in good yield by cyclocondensation of 1.3-bis(beta-D-glucopyranosyl)thiourea. (C), 2002 Elsevier Science Ltd. All rights reserved.
机构:
Istanbul Univ, Fac Engn, Dept Chem, TR-34320 Istanbul, TurkeyIstanbul Univ, Fac Engn, Dept Chem, TR-34320 Istanbul, Turkey
Ibis, Cemil
Ozsoy-Gunes, Zeliha
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机构:
Istanbul Univ, Hasan Ali Yucel Educ Fac, Dept Elementary Educ, Div Sci Educ, TR-34070 Istanbul, TurkeyIstanbul Univ, Fac Engn, Dept Chem, TR-34320 Istanbul, Turkey