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• W2952832972 abstract "A convenient preparation of the parent tetrahydrobenzodifuran 2 was developed from resorcinol. The oxidation of one or both furan rings of this key intermediate was accomplished with DDQ and the resulting benzodifuran was subsequently reacted with 3,6-dimethoxycarbonyl-1,2,4,5-tetrazine to afford the expected pyridazino-psoralen derivative in good yield. This simple method allowed the efficient preparation of a pyridazino-psoralen derivative with a formyl group at C-7, which was introduced by directed ortho-lithiation in the intermediate 2. An aminoalkyl side-chain was also introduced to the tetracyclic skeleton through the aldehyde functionality in a reductive amination process, which was accompanied by an unprecedented reduction of the pyridazine ring." @default.
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• W2952832972 date "2005-05-01" @default.
• W2952832972 modified "2023-10-06" @default.
• W2952832972 title "A furan ring expansion approach to the synthesis of novel pyridazino-psoralen derivatives" @default.
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• W2952832972 doi "https://doi.org/10.1016/j.tet.2005.03.018" @default.
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