Condensation products of 2‐bromo‐3‐substituted‐inden‐1‐ones with several primary amines

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<jats:title>Abstract</jats:title><jats:p>2‐Bromo‐3‐substituted‐inden‐1‐ones <jats:bold>2</jats:bold> reacted with L‐cysteine or 2‐aminobenzenethiol to produce 2,3‐dihydro‐5‐phenylindeno[2,1‐<jats:italic>b</jats:italic>][1,4]thiazine in moderate yield or 6‐substituted‐indeno[2,1‐<jats:italic>b</jats:italic>][1,4]benzothiazines in good yield. The debrominated oxime and the phenylhydrazone of <jats:bold>2</jats:bold> were separated into their respective <jats:italic>E</jats:italic>‐ and <jats:italic>Z</jats:italic>‐conformers by column chromatography and their <jats:italic>E</jats:italic>‐ and <jats:italic>Z</jats:italic>‐configurations were obtained from the <jats:sup>1</jats:sup>H nmr spectra.</jats:p>

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