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2005
Pyridazine derivatives
R 0500
A Furan Ring Expansion Approach to the Synthesis of Novel Pyridazino-Psoralen
— A novel, general procedure for the preparation of the title compounds
36- 141 Derivatives.
is based on the Diels—Alder reaction between 3,6-dimethoxycarbonyl-1,2,4,5-tetrazine (VI) and benzodifuran followed by furan ring expansion. This method also allows
the preparation of derivative (XIV) with a formyl group at C-7, which enables introduction of an aminoalkyl side chain by reductive amination reaction. —
(GONZALEZ-GOMEZ*, J. C.; SANTANA, L.; URIARTE, E.; Tetrahedron 61
(2005) 20, 4805-4810; Dep. Quim. Org., Fac. Farm., Univ. Santiago de Compostela,
E-15782 Santiago de Compostela, Spain; Eng.) — Bartels
2005
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