Tetrahedron Letters p. 4275 - 4278 (1987)
Update date:2022-08-03
Topics:
Lieberknecht, Albrecht
Griesser, Helmut
Several unsaturated diketopiperazines 1a-1f as well as a compound with the proposed structure 2 of barettin were synthesized by a new method via esters of diketopiperazine phosphonic acid.The proposed structure of barettin was found to be incorrect.
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