3 years ago

Stereoselective Synthesis of Functionalized Tetrahydro-1H-1,2-diazepines by N-Heterocyclic Carbene-Catalyzed [3 + 4] Annulation

Stereoselective Synthesis of Functionalized Tetrahydro-1H-1,2-diazepines by N-Heterocyclic Carbene-Catalyzed [3 + 4] Annulation
Xin-Ping Hui, Wei Wang, Shi-Ya Zhu, Yuanzhen Zhang
An efficient N-heterocyclic carbene (NHC)-catalyzed asymmetric [3 + 4] annulation reaction of N-Ts hydrazones with 2-bromoenals has been developed. A series of functionalized tetrahydro-1H-1,2-diazepines with two consecutive stereocenters was obtained using NHCs as the catalyst in good yields with excellent diastereo- and enantioselectivities.

Publisher URL: http://dx.doi.org/10.1021/acs.orglett.7b02657

DOI: 10.1021/acs.orglett.7b02657

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