Hypervalent iodine oxidation of α-substituted 2,4-dihydroxyacetophenones: synthesis of novel <i>o</i>-iodophenoxy ethers via rearrangement of iodonium ylides
                                
                                    
                                        作者:Om Prakash、Vijay Sharma、Madan P Tanwar                                    
                                    
                                        DOI:10.1139/v99-097
                                    
                                    
                                        日期:1999.7.1
                                    
                                    at reflux temperature, to afford novel o-iodophenoxy ethers (4a-4i) via rearrangement of respective iodonium ylides (5a-5i). Key words: hypervalent iodine reagents, phenyliodonium diacetate, α-substituted 2,4-dihydroxyacetophenones, α-substituted 2-hydroxy-3-iodo-4-phenoxyacetophenones, iodonium ylides rearrangement
                                    α-取代的 
2,4-二羟基苯乙酮 (1a-1i) 在三种条件下被二
乙酸苯基
碘 (
PIDA) 氧化 (i) 
PIDA-KOH-MeOH(碱性),0°C,(ii)
PIDA-MeOH(中性)在回流温度下,和 (iii) 
PIDA-AcOH(酸性)在回流温度下,通过各自
碘鎓叶立德(5a-5i)的重排得到新型邻
碘苯氧基醚(4a-4i)。关键词: 高价
碘试剂, 苯基
碘鎓二
乙酸盐, α-取代的
2,4-二羟基苯乙酮, α-取代的2-羟基-3-
碘-4-苯氧基
苯乙酮, 
碘鎓叶立德重排