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Ring Expansion of Isopropenyldihydrofuran Derivatives.

✍ Scribed by Seiji Yamaguchi; Nao Tsuchida; Kayoko Umeda; Hajime Yokoyama; Masahiro Miyazawa; Yoshiro Hirai

Publisher
John Wiley and Sons
Year
2006
Weight
25 KB
Volume
37
Category
Article
ISSN
0931-7597

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📜 SIMILAR VOLUMES

Ring expansion of isopropenyldihydrofura
Ring expansion of isopropenyldihydrofuran derivatives
✍ Seiji Yamaguchi; Nao Tsuchida; Kayoko Umeda; Hajime Yokoyama; Masahiro Miyazawa; 📂 Article 📅 2006 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 358 KB

## Abstract magnified image Lactonization of 2‐(hydroxymethyl)‐5‐isopropenyl‐4,5‐dihydrofuran‐3‐carboxylic acids **1a,b,c** with dicyclohexylcarbodiimide gave the corresponding furano‐lactones, 5‐isopropenyl‐5,6‐dihydro‐1(3__H__)‐furo[3,4‐__b__]furanone **2a,b,c**, which were readily converted to

Isopropenyldihydrofuran derivatives. Pre
Isopropenyldihydrofuran derivatives. Preparation and reactions of some isopropenyldihydrofurandicarboxylates
✍ Seiji Yamaguchi; Yosbihiko Sugioka; Miwa Ishida; Hajime Yokoyama; Yoshiro Hirai 📂 Article 📅 1997 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 538 KB

## Abstract Diethyl 5‐isopropenyl‐4,5‐dihydrofuran‐2,3‐dicarboxylate 1a and methyl 5‐isopropenyl‐3‐methoxy‐carbonyl‐4,5‐dihydrofuran‐2‐acetate 2a were prepared by cylization of diethyl 2‐oxosuccinate or dimethyl 3‐oxoglutarate with (__E__)‐1,4‐dibromo‐2‐methyl‐2‐butene. Their chemical properties we