Efficient Medium Ring Size Bromolactonization Using a Sulfur-Based Zwitterionic Organocatalyst
摘要:
Catalytic bromolactonization of long-chain olefinic acids resulting in the efficient synthesis of medium-sized lactones is reported using a zwitterionic catalyst and stoichiometric N-bromosuccinimide halogen source. The reaction was found to be more efficient at 0 degrees C than at room temperature, which could be attributed to the temperature dependence of the zwitterionic catalyst.
Efficient Medium Ring Size Bromolactonization Using a Sulfur-Based Zwitterionic Organocatalyst
摘要:
Catalytic bromolactonization of long-chain olefinic acids resulting in the efficient synthesis of medium-sized lactones is reported using a zwitterionic catalyst and stoichiometric N-bromosuccinimide halogen source. The reaction was found to be more efficient at 0 degrees C than at room temperature, which could be attributed to the temperature dependence of the zwitterionic catalyst.
Zwitterionic-Salt-Catalyzed Site-Selective Monobromination of Arenes
作者:Xiaodong Xiong、Fei Tan、Ying-Yeung Yeung
DOI:10.1021/acs.orglett.7b01899
日期:2017.8.18
A zwitterionic-salt-catalyzed electrophilic monobromination of arenes with high regioselectivity has been developed. Under mild reaction conditions, a wide range of monobrominated aromaticcompounds can be obtained in excellent yields. The reaction can be operated using an extremely low catalyst loading (0.05 mol %) with the inexpensive brominating agent N-bromosuccinimide. The versatility of this
Efficient Medium Ring Size Bromolactonization Using a Sulfur-Based Zwitterionic Organocatalyst
作者:Yi An Cheng、Tao Chen、Chong Kiat Tan、Jun Jie Heng、Ying-Yeung Yeung
DOI:10.1021/ja307210n
日期:2012.10.10
Catalytic bromolactonization of long-chain olefinic acids resulting in the efficient synthesis of medium-sized lactones is reported using a zwitterionic catalyst and stoichiometric N-bromosuccinimide halogen source. The reaction was found to be more efficient at 0 degrees C than at room temperature, which could be attributed to the temperature dependence of the zwitterionic catalyst.