Abe Noritaka
Affiliate Master
Yamaguchi University
Synthesis and some reactions of ethyl (2-alkylimino-1,2-dihydro-1-azaazulen-1-yl)acetates
Heterocycles Volume 56 Issue 1-2
Page 171-180
published_at 2002
Title
Synthesis and some reactions of ethyl (2-alkylimino-1,2-dihydro-1-azaazulen-1-yl)acetates
Ethyl (2-alkylimino-1,2-dihydro-1-azaazulen-1-yl)acetates (3) were synthesized from 2-alkylamino-1-ethoxycarbonylmethyl-1-azaazulenium salts, which were produced from 2-alkylamino-1-azaazulenes with ethyl bromoacetate. Reaction of 3 with acid anhydrides gave the mesoionic anhydro-3-acyl-1-alkyl-2-hydroxy-1,3a-diazacyclopent[a]azulenium hydroxide. Polar cycloaddition of 3 with methyl propiolate gave methyl 2-alkyl-1-oxo-1,2-dihydro-2,9b-diazaindeno[3,3a,4,5-bcd]azulene-8-carboxylate and 3-ethyl 5-methyl 2-alkylamino-2a-azabenz[cd]azulene-3,5-dicarboxylate.
Languages
eng
Resource Type
journal article
Publishers
日本複素環化学研究所
Date Issued
2002
File Version
Version of Record
Access Rights
open access
Relations
[ISSN]0385-5414
[NCID]AA00663739