Photodecarbonylation of Ketodiacids as Ammonium Salts: Efficient Formation of C−C Bonds Between Adjacent Quaternary Centers in the Crystalline State
作者:Farnosh Family、Miguel A. Garcia-Garibay
DOI:10.1021/jo802761t
日期:2009.3.20
Here we report the crystallization and solid photochemistry of six quaternary ammonium salts of 2,4-di-p-carboxyphenyl-2,4-dimethyl pentanone. While salt formation resulted in solids with different melting temperatures and crystallinities, photochemical excitation in the solid state resulted in the chemoselective formation of a single product arising from the homolytic loss of CO followed by combination
在这里我们报告了2,4-二-对-羧基苯基-2,4-二甲基戊酮的六种季铵盐的结晶和固体光化学。形成盐会导致固体具有不同的熔融温度和结晶度,而固态的光化学激发会导致化学选择性形成单一产物,这是由CO的均质流失引起,然后是中间自由基对的结合。溶液中的光化学实验导致产物混合物通过相应的自由基中间体的结合和歧化形成。DSC,13 C CP-MAS NMR和XRPD记录了所有盐的结晶度。