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A One-Step Synthesis of 2,3-Dihydro-4 H -pyran-4-ones from 3-Ethoxy α,β-Unsaturated Lactones

✍ Scribed by Winkler, Jeffrey D.; Oh, Kyungsoo


Book ID
127181370
Publisher
American Chemical Society
Year
2005
Tongue
English
Weight
51 KB
Volume
7
Category
Article
ISSN
1523-7060

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Hetero-Diels-Alder Additions of α,β-Unsa
✍ Jin-Cong Zhuo; Hugo Wyler; Kurt Schenk 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 German ⚖ 930 KB

## Abstract Cycloadditions of the α,β‐unsaturated‐acyl cyanides 1–3 with (__Z__)‐or (__E__)‐1‐bromo‐2‐ethoxyethene (4) may be performed at moderate temperatures and provide in good yields the 3‐bromo‐2‐ethoxy‐3,4‐dihydro‐2__H__‐pyran‐6‐carbonitriles 5–7, respectively (__Scheme 1__). Diastereoisomer