DOI: 10.1039/d6ob00895j ISSN: 1477-0520
Advances in the construction of seven-membered rings via N-heterocyclic carbene (NHC) catalysis
Fei Ning, Sha Yang, Zhichao Jin, Jian Wu, Zhiguo Zheng, Shengxin GuoReview summarizes NHC-catalyzed seven-membered ring synthesis since 2022. Five strategies: a 1 -d 1 addition, esterification, Michael addition, vinylogous electrophilic addition, and homoenolate reactions. It outlines principles and offers a reference.