The one-pot synthesis of cyclic isothioureas is reported. This method provides a straightforward and efficient approach to the synthesis of a broad range of cyclic isothioureas with yields of up to 90% and in quantities of up to 5 g. It is of great value for the preparation of classic organocatalysts, such as benzotetramisole and homobenzotetramisole.

中文翻译：

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一锅法合成环状异硫脲

报道了环状异硫脲的一锅法合成。该方法提供了一种直接且有效的方法来合成范围广泛的环状异硫脲，产率高达 90%，数量高达 5 g。它对于制备经典的有机催化剂，如苯并四甲醚和均苯并四甲醚具有重要价值。