2-羟基吡啶 、
potassium tert-butylate 、 toluene-4-sulfonic acid (3R,3aS,6S,6aR)-6-(3-cyclohexyl-ureido)-hexahydro-furo[3,2-b]furan-3-yl ester 在
acetonitrile-water 、
三氟乙酸 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.25h,
以to give 41 mg (33%) of 1-cyclohexyl-3-[(3S,3aR,6S,6aS)-6-(pyridin-2-yloxy)-hexahydro-furo[3,2-b]furan-3-yl]-urea along with 19 mg (15%) of the regioisomeric 1-cyclohexyl-3-[(3S,3aR,6S,6aR)-6-(2-oxo-2H-pyridin-1-yl)-hexahydro-furo[3,2-b]furan-3-yl]-urea的产率得到1-cyclohexyl-3-[(3S,3aR,6S,6aS)-6-(pyridin-2-yloxy)-hexahydro-furo[3,2-b]furan-3-yl]-urea