A new very mild K2CO3-catalysed one-pot two-carbon ring expansion of cyclopentanones
Abstract
Cyclic α-carbonyl-substituted cyclopentanones undergo, in a one-pot process, an unprecedented K2CO3-catalysed cascade Michael addition-regioselective aldol cyclisation-reverse Dieckmann reaction with α,β-unsaturated aldehydes in methanol or ethanol at room temperature to afford stereoselectively substituted cycloheptane derivatives.
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