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Pyridine ring formation by the reaction of conjugated carbodiimides with enamines

Technology reports of the Yamaguchi University Volume 5 Issue 1 Page 1-9
published_at 1992-12
KJ00004351145.pdf
[fulltext] 539 KB
Title
Pyridine ring formation by the reaction of conjugated carbodiimides with enamines
Creators Nishida Akio
Creators Isomura Yuji
Creators Noguchi Michihiko
Source Identifiers
The reaction of N-[6-methyl-2-oxo-4(2H)-pyranyl]-substituted carbodiimides 3, generated by the treatment of [6-methyl-2-oxo-4(2H)-pyranyl] iminotriphenylphosphorane (1) with isocyanates 2 in situ, with 1-(1-pyrrolidinyl) cyclopentene (4) in refluxing toluene or dioxane gave cyclopenta [d] pyrano [4,3-b] pyridine derivatives 5. A similar reaction of 3 with 1-(1-pyrrolidinyl) cyclohexene (6) afforded pyrano [4,3-b] isoquinoline derivatives 7 and 8. Compound 8 corresponds formally to the adduct of 7 and isocyanate 2.
Subjects
工学 ( Other)
Languages eng
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1992-12
File Version Version of Record
Access Rights open access
Relations
[ISSN]0386-3433
[NCID]AA0086073X
Schools 工学部