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Evidence of a 1,4-dipole intermediate in the reaction of 1-phenyl-4-vinylpyrazole with ptad

✍ Scribed by Jose Sepulveda-Arques; Mercedes Medio Simón


Book ID
108383376
Publisher
Elsevier Science
Year
1985
Tongue
French
Weight
154 KB
Volume
26
Category
Article
ISSN
0040-4039

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✍ Adam, Waldemar ;Lucchini, Vittorio ;Pasquato, Lucia ;Peters, Eva-Maria ;Peters, 📂 Article 📅 1986 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 577 KB

Cycloaddition of PTAD to 7-methylenenorbornene (1 a) afforded the rearrangement urazole 2a, but not with 7-(pheny1methylene)norbornene (1 b) and 7-(chloromethylene)norbornene (lc). Instead, besides the [2 + 23 cycloadducts 3b and 3c, respectively, l b gave the double [4 + 23 adduct 4b and l c the no