Synthesis of Isomeric Isothiazolo [4′, 3′: 4, 5]-and Isothiazolo [4′, 5′: 4, 5] thieno [3, 2-b] pyrano [2, 3-d] pyridines by Combination of Domino Reactions

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~0%

~36%

~88%

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~64%

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~76%

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