Di-p-nitrobenzyl azodicarboxylate is prepared in 83.6% yield in two steps as a bright yellow solid, which can be used as an azo-reagent in the Mitsunobureaction. When a chiral secondary alcohol was used, sufficient configurational inversion of alcohol occurred under Mitsunobu conditions. That the hydrazine produced from DNAD is semisoluble in some solvents such as THF and CH2Cl2 makes it separated
Dicyclopentyl azodicarboxylate (DCpAD): A new alternative azo-reagent for the Mitsunobu reaction
作者:Jian Hai Yang、Li Yan Dai、Xiao Zhong Wang、Ying Qi Chen
DOI:10.1016/j.cclet.2011.03.017
日期:2011.9
Dicyclopentyl azodicarboxylate is introduced as a new azo-reagent which can be conveniently prepared in two steps and be used in the Mitsunobureaction. Though there are no distinct difference of reactivity between DCpAD and DEAD, the former is a more preferable azo-reagent for its stability.