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Regiospecific preparation of γ-carbolines andpyrimido[3, 4-a]indole derivatives by intramolecular ring-closure of heterocumulene-substituted indoles

✍ Scribed by Pedro Molina; Julia´n Alca´ntara; Carmen Lo´pez-Leonardo


Book ID
103405255
Publisher
Elsevier Science
Year
1996
Tongue
French
Weight
649 KB
Volume
52
Category
Article
ISSN
0040-4020

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Aza Wittlg-type reactIonof~bu(rm~nophosphoranel I wrth one mole of-zsocyanate leads to the zmmophosphoranes 5 whrcti by treatment with a secondmok of-uocyanate affordedpyndo[2,3,Cde/qutnazo~nes 6 Smularly, reaction with ketenes leads to the formanon of benzo[del[l,6]naphthyrrdmes9 Direct converszon