2024
DOI: 10.1039/d3cc06033k
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Ring expansion of spirocyclopropanes with stabilized sulfonium ylides: highly diastereoselective synthesis of cyclobutanes

Hisanori Nambu,
Yuta Onuki,
Kana Aso
et al.

Abstract: A novel method was devised for regioselective ring expansion of Meldrum’s acid-derived spirocyclopropanes to spirocyclobutanes with stabilized sulfonium ylides, affording 1,2-trans-disubstituted 6,8-dioxaspiro[3.5]nonane-5,9-diones in up to 87% yields without the formation...

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