Chemistry Letters p. 1301 - 1304 (1984)
Update date:2022-08-03
Topics:
Shin, Chung-gi
Nakajima, Yoshiharu
Sato, Yoshiaki
The condensation of 1,4-diacetyl-2,5-piperazinedione with salicylaldehyde gave 1-acetyl-(Z)-3-salicylidene-2,5-piperazinedione and 3-(N-acetylglycyl)aminocoumarin by ca. 1 : 1 ratio.The former was readily converted with t-BuOCl into spiro<3H-benzofuran-2,3'-(2',5'-dioxo)-piperazine> derivative which has a main skeleton of aspirochlorin.
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