Tetrahedron Letters p. 4475 - 4478 (1984)
Update date:2022-07-29
Topics:
Schmidt, Arthur H.
Becker, Ulla
Aimene, Amokrane
Squaric acid 1 reacts with equimolar amounts of tertiary amines 7 and tertiary phosphines 8 in acetic anhydride to afford the monocondensationproducts 4 and 5, respectively.
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