Tetrahydrothiopyran-4-one → 3,4-dihydro-6-(1,1-dimethylethyl)-8-iodospiro-[2H-1,3-benzoxazine-2,4'-tetrahydrothiopyran]

Beteiligte Stoffe

Reaktionsschritte

A mixture of 2-aminomethyl-4-(1,1-dimethylethyl)-6-iodophenol (3.0 g., 0.01 mole), tetrahydrothiopyran-4-one (1.18 g., 0.01 mole), and benzene (100 ml.), is refluxed under a Dean-Stark trap for 4 hr. The solvent is evaporated, and the residue is crystallized from ethanol to obtain 3,4-dihydro-6-(1,1-dimethylethyl)-8-iodospiro-[2H-1,3-benzoxazine-2,4'-tetrahydrothiopyran], (2.5 g.), m.p. 123°-124° C.

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