A one pot, three component synthesis of tetrazoles via thiourea has been accomplished in water. Water enhances the solubility of a higher number of components in the three component protocol thus promoting the reaction. The synthesis involves a chemoselective exocyclic reaction, regioselective electrocyclisation and a preferred conformational orientation of the tetrazole side chain which are rationalised based on the relative magnitude of Garbisch angle strain/allylic strains anticipated during the course of the reaction.
通过
硫脲在
水中完成了
四唑的一锅三组份合成。
水提高了三组分方案中更多组分的溶解度,从而促进了反应的进行。该合成涉及
化学选择性外环反应、区域选择性电环化和
四氮唑侧链的优先构象取向,这些都是根据反应过程中预期的加比什角应变/烯丙基应变的相对大小而合理确定的。