Activation of α-Diazocarbonyls by Organic Catalysts: Diazo Group Acting as a Strong N-Terminal Electrophile
作者:Lei Li、Jia-Jia Chen、Yi-Jin Li、Xiu-Bin Bu、Qun Liu、Yu-Long Zhao
DOI:10.1002/anie.201505064
日期:2015.10.5
N‐terminal electrophiles in the presence of bicyclic amidine catalysts. The CN bond‐forming reactions of active methylene compounds as C nucleophiles with α‐diazocarbonyls as N‐terminal electrophiles proceed quickly under ambient conditions, in the presence of 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU), because of the formation of the reactive N‐terminal electrophilic intermediates. DBU activates both the
在双环am催化剂存在下,α-重氮羰基首次被用作高活性N-末端亲电体。与c 为C的亲核试剂与α-diazocarbonyls N-末端亲电子活性亚甲基化合物的N键形成反应快速地进行在环境条件下,在1,8-二氮杂双环[5.4.0]十一碳-7-烯的存在下( DBU),因为形成了反应性的N端亲电子中间体。DBU会同时激活活性亚甲基和α-重氮羰基。重要的是,该反应对于活性亚甲基和α-重氮羰基都是通用的,并且活化方式将导致α-重氮羰基的新合成应用。