Carbon-Carbon Double Bond Formation Between α-Haloketones and Aldehydes Mediated by SnCl2/Na2So3; Synthesis of (E) - α, β - Unsaturated Ketones

Abstract
One-pot reactions of α-haloketones with aldehydes in the presence of excess SnCl2/Na2SO3 or SnCl2 alone in THF at reflux were found to afford (E) - α, β - unsaturated ketones in fair to good yields.