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We discovered a novel organocatalysed multicomponent domino Knoevenagel-aza-Michael-cyclocondensation reaction leading to an unprecedented straightforward synthesis of 1,5-diazabicyclo[3.3.0]octane-2,6-diones. The specific capability of the (DHQ)2PHAL organocatalyst in this process was also highlighted to eventually furnish the corresponding bicyclopyrazolidinones with up to 96 : 4 er.
E. Pair, C. Berini, R. Noël, M. Sanselme, V. Levacher and J. Brière, Chem. Commun., 2014, 50, 10218 DOI: 10.1039/C4CC04852K
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