作者:Kristina Eriksen、Anne Ulfkjær、Theis I. Sølling、Michael Pittelkow
DOI:10.1021/acs.joc.8b01468
日期:2018.9.21
induced OBn → SBn and OBn → SeBn migration reactions facilitate the rearrangement of O-benzyl thio- and selenocarbamates [BnOC(═X)NMe2] (X = S or Se) into their corresponding S-benzyl thio- and Se-benzyl selenocarbamates [BnXC(═O)NMe2] (X = S or Se). A series of substituted O-benzyl thio- and selenocarbamates were synthesized and rearranged in good yields of 33–88%. The reaction rates are higher for substrates
热诱导的O Bn →S Bn和O Bn →Se Bn迁移反应有助于将O-苄基硫代和硒代氨基甲酸酯[BnOC(═X)NMe 2 ](X = S或Se)重排为相应的S-苄硫基-和Se-苄基硒代氨基甲酸酯[BnXC(= O)NMe 2 ](X = S或Se)。一系列取代的O合成并重排了苄基硫代氨基甲酸酯和硒代氨基甲酸酯,产率为33–88%。对于在芳族环的2或4位具有给电子基团的底物,反应速率较高,但是重排也随着吸电子取代基进行。重排遵循一级反应动力学,并通过由苄基碳正离子和硫代或硒代氨基甲酸酯部分组成的紧密离子对中间体进行。计算研究支持了这些发现。