Various types of 1,2,3,4-pentatetraenes 4 and 1,2,3,4-pentatetraene episulfides (1 and 2) were synthesized readily and selectively by the alkenylidene carbene addition to thioketene. Thermal, photochemical, and acid-promoted reactions of 1 and 2 resulted in a formation of novel conjugated thiones 5 and 6.

中文翻译：

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1，2，3，4-戊四烯环硫化物的简便合成和新反应

通过将烯基亚基卡宾添加到硫代乙烯酮中，可以轻松，选择性地合成各种类型的1,2,3,4-戊四烯4和1,2,3,4-戊四烯环硫化物（1和2）。1和2的热，光化学和酸促进的反应导致形成新型共轭硫酮5和6。