The first divergent cyclization reaction of benzo[c][1,2]dithiol-3-ones to assemble six- and eight-membered N-containing heterocycles is displayed herein. This unprecedented formal [4 + 4]/[4 + 2] cycloaddition of 3H-benzo[c][1,2]dithiol-3-ones and hexahydro-1,3,5-triazines is controlled by the N-substituent group of hexahydro-1,3,5-triazines. This newly discovered tactic features transition-metal-free, no inert gas protection, easy operation, mild conditions, decent yields, broad substrate scope and accessible scalability.

中文翻译：

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苯并[c][1,2]二硫醇-3-酮和六氢-1,3,5-三嗪的取代基控制的发散环化反应

本文展示了苯并[ c ][1,2]二硫醇-3-酮组装六元和八元含氮杂环的第一个发散环化反应。 3 H-苯并[ c ][1,2]二硫醇-3-酮和六氢-1,3,5-三嗪的这种前所未有的正式[4 + 4]/[4 + 2]环加成反应由N-取代基控制六氢-1,3,5-三嗪基团。这种新发现的策略具有不含过渡金属、无惰性气体保护、操作简便、条件温和、收率良好、底物范围广泛和可扩展性等特点。