Unusual cycloaddition behavior of 2-substituted norbornadienes with triazolinediones
作者:Waldemar Adam、Luis A. Arias、Ottorino De Lucchi
DOI:10.1016/s0040-4039(00)86841-0
日期:——
2-Chloronorbornadiene affords with 4-phenyltriazolinedione the homocycloadduct (1a) regioselectively as major product, along with small yields of the (2+2)-cycloadduct (2a), the dipolar rearrangement product (3a), and the ring insertion product (4a), while 2-trimethylsilyloxynorbornadiene leads to the ene-product (7c).
2-氯降冰片二烯与4-苯基三唑啉二酮一起选择性选择性地提供高环加成物(1a),以及(2 + 2)-环加成物(2a),偶极重排产物(3a)和环插入产物(4a)的少量收率。 ),而2-三甲基甲硅烷基氧基降冰片二烯则生成烯产物(7c)。