PROCESS AND COMPOSITION OF MAKING POLYMERIZABLE RESINS CONTAINING OXAZOLIDONE
申请人:JIN XIAOMING
公开号:US20130184467A1
公开(公告)日:2013-07-18
Disclosed herein are a process and composition to make polymerizable resins containing oxazolidone, in which organic acid-catalyzed and/or thermal annealing process got involved and consequently promoted a unique intramolecular transformation from a linear urethane linkage to a cyclic urethane linkage for those specifically constructed urethane resins containing α-substituted β-ketone moieties.
An efficient method for the direct preparation of high synthetic valuable a-hydroxycarbonyls is described. The simple and readily available I-2 or NBS was used as catalyst. DMSO acts as the oxidant, oxygen source, and solvent. A diverse range of tertiary Csp(3)-H bonds as well as more challenging secondary Csp(3)-H bonds could be hydroxylated in this transformation. The reaction is mild, less toxic and easy to perform.