Regioselective (phenylcarbamoyl)ation of polyhydroxy compounds by phenyl isocyanate-zinc naphthenate
作者:Shigeyoshi Nishino、Yoshiharu Ishido
DOI:10.1016/s0008-6215(00)90142-3
日期:1986.11
In the presence of zinc naphthenate as the catalyst, the reaction of phenyl isocyanate with 1,2-propanediol and 3,4-O-isopropylidene-d-mannitol gave the primary phenylcarbamates in high yield. 1,2,6-Hexanetriol was selectively phenylcarbamoylated at O-1, and N6-benzyladenosine at O-2′. The common methyl aldohexo- and aldopento-pyranosides gave the 3-mono(phenylcarbamate)s in fair to excellent yields
在环烷酸锌存在下,苯基异氰酸酯与1,2-丙二醇和3,4-O-异亚丙基-d-甘露糖醇的反应以高收率得到伯苯基氨基甲酸酯。1,2,6-己三醇在O-1处被选择性苯氨基甲酰化,在O-2'处被N6-苄基腺苷选择性地苯甲酰化。常见的甲基乙二醛和醛糖基-吡喃二糖苷以相当高的产率获得了3-单(苯基氨基甲酸酯),在某些情况下还具有相当比例的2-酯。当不使用锌盐时,O-6是六吡喃糖苷中最活泼的氧原子。