title: N-heterocyclic carbene catalyzed [4+2] cycloaddition of nitroalkenes with oxodienes.
abstract: NHC catalysis: N-heterocyclic carbenes were found to be efficient catalysts for the unprecedented [4+2] cycloaddition of nitroalkenes and oxodienes, giving the corresponding dihydropyrans in good yield with good diastereoselectivity (see scheme). Deuteration experiment reveals that the reaction is possibly initiated by the addition of N-heterocylic carbene to nitroalkenes.
authors: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
authors: Xiang-Yu
authors: XY
authors: Chen
authors: Li-Hui
authors: LH
authors: Sun
authors: Song
authors: S
authors: Ye