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Efficient Synthesis of 4-(2‘-Alkenyl)-2,5-dihydrofurans and 5,6-Dihydro-2 H -pyrans via the Pd-Catalyzed Cyclizative Coupling Reaction of 2,3- or 3,4-Allenols with Allylic Halides

✍ Scribed by Ma, Shengming; Gao, Wenzhong

Book ID
127264020
Publisher
American Chemical Society
Year
2002
Tongue
English
Weight
214 KB
Volume
67
Category
Article
ISSN
0022-3263

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Efficient synthesis of 4-(2′-alkenyl)-2,
Efficient synthesis of 4-(2′-alkenyl)-2,5-dihydrofurans via PdCl2-catalyzed coupling–cyclization reaction of 2,3-allenols with allylic halides
✍ Shengming Ma; Wenzhong Gao 📂 Article 📅 2000 🏛 Elsevier Science 🌐 French ⚖ 65 KB

4-(2%-Alkenyl)-2,5-dihydrofurans can be efficiently synthesized via the PdCl 2 -catalyzed coupling-cyclization of allylic halides with 2,3-allenols in DMA at rt in moderate to good yields. The regioselectivity is different from that of the Pd(0)-catalyzed coupling-cyclization of organic halides with

ChemInform Abstract: Efficient Synthesis
ChemInform Abstract: Efficient Synthesis of 4-(2′-Alkenyl)-2,5-dihydrofurans via PdCl2-Catalyzed Coupling—Cyclization Reaction of 2,3-Allenols with Allylic Halides.
✍ Shengming Ma; Wenzhong Gao 📂 Article 📅 2001 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

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PdI2-Catalyzed Coupling–Cyclization Reac
PdI2-Catalyzed Coupling–Cyclization Reactions Involving Two Different 2,3-Allenols: An Efficient Synthesis of 4-(1′,3′-Dien-2′-yl)-2,5-dihydrofuran Derivatives
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## Abstract Transition‐metal‐catalyzed dimeric coupling–cyclization reactions of two different 2,3‐allenols afforded 4‐(1′,3′‐dien‐2′‐yl)‐2,5‐dihydrofuran derivatives **3**. 2‐Substituted 2,3‐allenols **1** cyclized to form the 2,5‐dihydrofuran ring, whereas the 2‐unsubstituted 2,3‐allenols **2** p