The reaction of 2,3-dihalogeno-1,4-naphthoquinone with dithiooxamide gave dibenzo[b,i]thianthrene-5,7,12,14-tetrone in high yield but not 2,2′-bis(naphtho[2,3-d]thiazole-4,9-dione) which was previously reported. A similar reaction of 3,4-dichloro-N-phenylmaleimide with dithiooxamide also gave the corresponding sulfur heterocycles but not the reported bisthiazole.

中文翻译：

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2,3-二氯-1,4-萘醌与二硫代草酰胺的反应。二苯并[ b，i ]噻吨-5,7,12,14-四氢萘的合成

2,3-二卤代-1,4-萘醌与二硫代草酰胺的反应以高收率得到了二苯并[ b，i ]噻蒽-5,7,12,14-四元，但没有得到2,2'-bis（naphtho [2， 3 - d ]噻唑-4，9-二酮）。3，4-二氯-N-苯基马来酰亚胺与二硫代草酰胺的类似反应也给出了相应的硫杂环，但没有报道的联噻唑。