申请人:UNIV HONG KONG POLYTECHNIC
公开号:WO2010015211A1
公开(公告)日:2010-02-11
The present invention provides an improved process for preparing an oxazoline compound of the formula: (I) wherein R1 and R2 are independently hydrogen, sulfide, sulfoxide, sulfonyl, optionally substituted lower alkyl, optionally substituted aralkyl, optionally substituted aryl or optionally substituted polycyclic arylyl; or R1 and R2 combined together with the carbon atoms to which they are attached form an optionally substituted fused 6-member aromatic ring provided that R1 and R2 are attached to carbon atoms adjacent to each other; and R3 is hydrogen, sulfide, sulfoxide, sulfonyl, optionally substituted lower alkyl, optionally substituted aralkyl, optionally substituted aryl or optionally substituted polycyclic arylyl; or an enantiomer therof; or an enantiomeric mixture therof; comprising the step of contacting an acylamino alcohol compound to a suitable amount of fluoroalkanesulfonyl fluoride compound and organic basic reagent. By using a fluoroalkanesulfonyl fluoride compound with an organic basic reagent, the present invention efficiently converts acylamino alcohol compounds into highly chemoselective oxazoline compounds with a remarkable variety of substrates, mild conditions and relatively short reaction time.
本发明提供了一种改进的制备氧杂环丙烯酮化合物的方法,其化学式为:(I),其中R1和R2分别为氢、硫化物、亚氧化物、磺酰基、可选择取代的较低烷基、可选择取代的芳基烷基、可选择取代的芳基或可选择取代的多环芳基;或者R1和R2与它们附着的碳原子结合在一起形成可选择取代的融合6-环芳香环,前提是R1和R2附着在彼此相邻的碳原子上;而R3为氢、硫化物、亚氧化物、磺酰基、可选择取代的较低烷基、可选择取代的芳基烷基、可选择取代的芳基或可选择取代的多环芳基;或其对映体;或其对映体混合物;包括将酰胺醇化合物与适量的氟代烷磺酰氟化合物和有机碱性试剂接触的步骤。通过使用氟代烷磺酰氟化合物和有机碱性试剂,本发明能够高效地将酰胺醇化合物转化为高度化学选择性的氧杂环丙烯酮化合物,适用于多种底物,反应条件温和,反应时间相对较短。