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Please login to access the full content or check if you have access via Variation 2: Of 1-Azaspiro[2.2]pentanes

DOI: 10.1055/sos-SD-026-00397

Salaün, J.Science of Synthesis, (200526579.

Azaspiropentanes 110, formed similarly to oxaspiropentanes by addition of phenyl azide to methylenecyclopropanes, undergo acid, thermally, or photolytically induced ring expansion into cyclobutanimines 111 in high yields (Scheme 42).[‌99‌] Acid-catalyzed hydrolysis of cyclobutanimines 111 quantitatively yields the corresponding cyclobutanones 112 (Scheme 42).[‌99‌]

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