Methyl 2-methyl-1,3-dioxolane-2-butanoate → 8-chlorodibenz[b,f][1,4]oxazepine-10(11H)-carboxylic acid, 2-[4-(2-methyl-1,3-dioxolan-2-yl)-1-oxobutyl]hydrazide

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8-chlorodibenz[b,f][1,4]oxazepine-10(11H)-carboxylic acid, 2-[4-(2-methyl-1,3-dioxolan-2-yl)-1-oxobutyl]hydrazide (26) was prepared in the manner described above in Example 18 from methyl 2-methyl-1,3-dioxolane-2-butanoate (25), prepared as described above in Example 25, and 8-chlorodibenz[b,f][1,4]oxazepine-10(11H)-carboxylic acid, hydrazide (1), prepared in the manner described above in Example 1, on a 2 mmol scale to yield 0.47 g (53%) of product. Analysis calculated for C22H24N3O5Cl. 0.2 H2O (M.W. 449.51): C, 58.79; H, 5.74; N, 9.35; Cl, 9.15. Found: C, 58.47; H, 5.58; N, 9.30; Cl, 9.15.

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