Tertiary Amine Mediated Tandem Cross‐Rauhut–Currier/Acetalization Reactions: Access to Functionalized Spiro‐3,4‐Dihydropyrans

Abstract

γ-Protonentransfer ermöglichte die hoch selektive Titelreaktion, bei der cyclische β-Halogenenale 1 mit β,γ-ungesättigten α-Ketoestern 2 zu funktionalisierten Spiro-3,4-dihydro-2H-pyranen 3 reagieren, in deren Gerüst ein α-quartäres Kohlenstoffzentrum und eine Vinylhalogenidgruppe benachbart sind. DBU=1,8-Diazabicyclo[5.4.0]undec-7-en, Tos=4-Toluolsulfonyl. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.