Sulfonylation of 1,4-Diazabicyclo[2.2.2]octane: Charge-Transfer Complex Triggered C−N Bond Cleavage
作者:Ying Fu、Qin-Shan Xu、Quan-Zhou Li、Ming-Peng Li、Chun-Zhao Shi、Zhengyin Du
DOI:10.1002/open.201800251
日期:2019.1
A novel charge‐transfer complex triggered sulfonylation of 1,4‐diazabicyclo[2.2.2]octane (DABCO) with mild reaction conditions has been developed. The formation of a charge‐transfer complex between electron‐withdrawing (hetero)aryl sulfonyl chloride and DABCO allows the synthesis of N‐ethylated piperazine sulfonamide in good yields. The reaction has a high functional group tolerance. Spectroscopic
新型的电荷转移复合物在温和的反应条件下引发了1,4-二氮杂双环[2.2.2]辛烷(DABCO)的磺酰化反应。吸电子(杂)芳基磺酰氯和DABCO之间形成电荷转移络合物,可以合成高收率的N-乙基化哌嗪磺酰胺。该反应具有较高的官能团耐受性。光谱学研究证实了磺酰氯与DABCO之间形成了电荷转移复合物,这促进了DABCO的C-N键裂解。