ChemInform Abstract: Ring Closure of 4-S
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Yoshimi Yamaguchi; Kaname Takagi; Yoshihisa Okamoto; Kazuho Harada; Yoshihisa Ku
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Article
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2010
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John Wiley and Sons
โ 30 KB
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ring closure reactions ring closure reactions O 0130 ## 45 -062 Ring Closure of 4-Substituted 1-Amino-1-(2-aminoanilino)-2,4dicyanobuta-1,3-diene via 5-exo-trig and 6-exo-dig Process. -The formation of benzimidazoles (II) by heating of butadienes (I) in AcOH or aq. HCl is the result of a 5-exo-tr