Catalytic MBH reaction of β-substituted nitroalkenes with azodicarboxylates
作者:Xiang-Yu Chen、Fei Xia、Song Ye
DOI:10.1039/c3ob40804c
日期:——
An unprecedented N-heterocyclic carbene (NHC) catalyzed Morita–Baylis–Hillman (MBH) reaction of β-substituted nitroalkenes and azodicarboxylates has been developed. Both β-aryl and β-alkyl nitroalkenes worked well for the reaction using 5 mol% of NHC catalyst, giving the desired α-hydrazino-α,β-unsaturated nitroalkenes in good to excellent yields.
Synthesis of hydrazinoheterocycles from Morita–Baylis–Hillman adducts of nitroalkenes with azodicarboxylates
作者:Vaijinath Mane、Jyoti Pandey、Narasihmam Ayyagari、Chandan Dey、Raju Kale、Irishi N. N. Namboothiri
DOI:10.1039/c5ob02656c
日期:——
Conjugatednitroalkenes and nitrodienes undergo smooth α-hydrazination with azodicarboxylates through an imidazole catalyzed carbon–heteroatom bond formation under Morita–Baylis–Hillman conditions. The resulting hydrazinonitroalkenes take part in 1,3-dipolar cycloaddition with azide under mild conditions to give hydrazinotriazoles. A [3 + 2] annulation with phenols and naphthols involving Michael addition