Reactions of 2-aminoazulenes with electron-deficient acetylenes

Creators Abe Noritaka

2-Aminoazulene (1a) reacted with dimethyl acetylenedicarboxylate (DMAD) to give dimethyl 1,2-azulenedicarboxylate, tetramethyl 2,2′-(2-amino-1,3-azulenediyl)bis[fumarate], and dimethyl 2-(4-methoxycarbonyl-2-oxo-l,2-dihydroazuleno[2,1-b]pyridin-10-yl)fumarate. The reaction of ethyl 2-amino-1-azulenecarboxylate (1b) with DMAD gave dimethyl 2-(2-amino-3-ethoxycarbonyl-1-azulenyl)fumarate and 10-ethyl 4-methyl 2-oxo-1,2-dihydroazuleno[2,1-b]pyridine-4,10-dicarboxylate (8a). The treatment of 8a with phosphoryl chloride gave the 2-chloroazuleno[2,1-b]pyridine derivative. Reactions of 1a and 1b with methyl propiolate gave corresponding Michael adducts and the azuleno[2,1-b]pyridin-3(4H)-one derivatives. Reactions of 1a and 1b with dibenzoylacetylene gave 4-benzoyl-2-phenylazuleno[2,1-b]pyridine derivatives.

[ISSN]0009-2673

[NCID]AA00580132

info:doi/10.1246/bcsj.64.2393

[isVersionOf] [URI]http://www.jstage.jst.go.jp/browse/bcsj/-char/en