Chemoselective Synthesis of 1,1-Disubstituted Vinyl Triflates from Terminal Alkynes Using TfOH in the Presence of TMSN<sub>3</sub>
作者:Jumreang Tummatorn、Kunlayanee Punjajom、Warabhorn Rodphon、Sureeporn Ruengsangtongkul、Nattawadee Chaisan、Kanyapat Lumyong、Charnsak Thongsornkleeb、Phongprapan Nimnual、Somsak Ruchirawat
DOI:10.1021/acs.orglett.9b01576
日期:2019.6.21
1,1-Disubstituted vinyl triflates are synthesized by direct hydrotriflation of terminal alkynes employing a combination of TfOH and TMSN3 in DCM at room temperature. Interestingly, under these conditions, only terminal alkynes were selectively converted to the corresponding vinyl triflates, while internal alkynes were not reacted. A broad range of substrates were successfully converted to the corresponding
通过在室温下在DCM中使用TfOH和TMSN 3的组合对末端炔进行直接加氢精制反应来合成1,1-二取代的乙烯基三氟甲磺酸酯。有趣的是,在这些条件下,只有末端炔烃被选择性地转化为相应的乙烯基三氟甲磺酸酯,而内部炔烃没有反应。甚至在分子中存在内部炔烃基团的情况下,各种各样的底物也能成功以良好的优良性能转化为相应的1,1-二取代乙烯基三氟甲磺酸酯。