Methyl 3-phenylsulphonyl orthopropionate: an efficient reagent for the synthesis of γ-lactones and butenolides
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Add time:07/17/2019 Source:sciencedirect.com
Treatment of methyl 3-phenylsulphonyl orthopropionate with n-BuLi gives the corresponding carbanion which reacts with aldehydes or ketones to yield β-phenylsulphonyl γ-lactones. Base-catalysed elimination of sulphinic acid yields α,β or β,γ-butenolides.
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