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Ring Closure of 4-Substituted 1-Amino-1-(2-aminoanilino)-2,4-dicyanobuta-1,3-diene via 5-exo-Trig and 6-exo-Dig Process

✍ Scribed by Okamoto, Yoshihisa; Yamaguchi, Yoshimi; Takagi, Kaname; Harada, Kazuho; Kurasawa, Yoshihisa

Book ID: 118249051
Publisher: Japan Institute of Heterocyclic Chemistry
Year: 1999
Tongue: English
Weight: 286 KB
Volume: 51
Category: Article
ISSN: 0385-5414
DOI: 10.3987/com-99-8561

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## Abstract Relatively few __exo__‐adducts have been obtained from the title compounds. Only one such mono‐adduct, **3**, is known. Several __exo‐endo__‐bis‐adducts have been obtained but the structure of one of these, **5**, has been proved unequivocally by X‐ray structural determination.