Tail-to-tail Cross-dimerization of Methyl Methacrylate/Methacrylonitrile with Acrylates Catalyzed by N-Heterocyclic Carbene
作者:Shin-ichi Matsuoka、Yuki Fukumoto、Masato Suzuki
DOI:10.1246/cl.170263
日期:2017.7.5
The tail-to-tail cross-dimerization of methyl methacrylate (MMA)/methacrylonitrile (MAN) with acrylates has been realized for the first time by an N-heterocyclic carbene organocatalysis to produce new difunctional compounds, four 2-methylhex-2-enedioates and three 5-cyanohex-4-enoates, in moderate to good isolated yields. The high selectivity was achieved by the dropwise addition of acrylates, leading
We and others have previously reported the intermolecularumpolungreactions of Michaelacceptorscatalyzed by an N-heterocycliccarbene (NHC). The representative tail-to-tail dimerization of methyl methacrylate (MMA) has now been intensively investigated, leading to the following conclusions: (1) The catalysis involves the deoxy-Breslow intermediate, which is quite stable and remains active after