Engineering Reactions in Crystalline Solids: Photochemical Generation of Secondary and Tertiary Enol Radical Pairs from Crystalline Ketodiesters
作者:Zhe Yang、Danny Ng、Miguel A. Garcia-Garibay
DOI:10.1021/jo005747m
日期:2001.6.1
solution and in the solid state. It is shown that the efficiency of the solid-state reaction depends on the stability of the intermediate acyl-alkyl and alkyl-alkyl radicalpairs. Reactions proceeding through tertiary enol radicals are more efficient than reactions proceeding through secondary enol radical centers. Solid-state reactions that require the intermediacy of primary enol radicals do not occur.
Engineering Reactions in Crystalline Solids: Radical Pairs in Crystals of Dialkyl 1,3-Acetonedicarboxylates
作者:Zhe Yang、Miguel A. Garcia-Garibay
DOI:10.1021/ol006042+
日期:2000.6.1
dialkyl succinates in high chemical yields by combination of alpha-carbonyl radicalpairs produced by photochemical decarbonylation. It is proposed that the solid-state reaction depends on the exothermicity of two consecutive bond cleavage processes. It is also suggested that the efficiency of radical formation in the solid state is determined by the effect of substituents on bond dissociation energies