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Intramolecular [3+2] nitrone-alkyne cycloaddition

✍ Scribed by Han-Young Kang; Yong Seo Cho; Hun Yeong Koh; Moon Ho Chang

Book ID
103402659
Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
263 KB
Volume
32
Category
Article
ISSN
0040-4039

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## Abstract The chiral nonracemic compound 4 was prepared from ethyl (__S__)‐(–)‐lactate and 1,4‐dibromo‐2‐butyne. Reduction with DIBAH at −72°C and subsequent treatment of the resulting dialdehyde with __N__‐methylhydroxylamine yielded the dinitrone 5, which underwent two consecutive intramolecula