MODARELLI, DAVID A.;LAHTI, PAUL M., J. CHEM. SOC. CHEM. COMMUN.,(1990) N7, C. 1167-1168
作者:MODARELLI, DAVID A.、LAHTI, PAUL M.
DOI:——
日期:——
Aryl Oxalate Derivatives as Convenient Precursors for Generation of Aryloxyl Radicals
作者:Paul M. Lahti、David A. Modarelli、Frank C. Rossitto、Ahmet Levent Inceli、Andrew S. Ichimura、Shyamala Ivatury
DOI:10.1021/jo951696v
日期:1996.1.1
oxalates (DAOs) for unimolecular generation of phenoxyl-based radicals under solution and rigid matrix conditions is described. AOCs are usable for photochemical generation of phenoxyl radicals, but are only conveniently stable as precursors when 2,6-di-tert-butylated derivatives are used. AOBs may be used as thermal precursors to aryloxylradicals, since they typically decompose within 2-3 h at 60-85 degrees
描述了在溶液和刚性基质条件下使用芳氧基草酰氯(AOC),芳氧基草酰叔丁基过氧化物(AOB)和草酸二芳基酯(DAO)来单分子生成苯氧基基团的现象。AOC可用于光化学生成苯氧基自由基,但仅当使用2,6-二叔丁基化衍生物时,才能方便地稳定用作前体。AOB可用作芳氧基的热前体,因为它们通常会在60-85摄氏度下2-3小时内分解以产生酚。(1)H-NMR溶液动力学研究发现,对于苯氧基草酰叔丁基过氧化物的分解,DeltaH()= 31 kcal / mol,DeltaS()= +3.4 cal / mol-K,这与过氧化物键断裂的基本一致一致。AOB和更稳定的DAO也是方便的光化学苯氧基自由基前体。