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- W2103206472 abstract "Cycloadditions of 3-aryl-1,2,4,5-tetrazines 1a-o with ethynyltributyltin 5 occur with high regioselectivity to yield 3-aryl-5-tributylstannyl-pyridazines 9–23 in 71–95% yield. Moreover, the stannanes obtained could be utilized as starting materials for the preparation of various 3,5-di-substituted pyridazines as shown for 3-phenyl-5-tributylstannyl-pyridazine 9b. Stille cross-couplings with aryl halides yield 3,5-diaryl-pyridazines 26–29, whereas exposure to elemental halogens furnished 3-phenyl-5-halogeno-pyridazines 24 and 25, which can be used as starting compounds for further functionalizations like Heck reaction." @default.
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- W2103206472 date "1998-04-01" @default.
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- W2103206472 title "Synthesis of 3,5-disubstituted pyridazines by regioselective [4+2] cycloadditions with ethynyltributyltin and subsequent replacement of the organotin substituent" @default.
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- W2103206472 doi "https://doi.org/10.1016/s0040-4020(98)00127-6" @default.
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