Zinc(II) Triflate-Controlled 1,3-Dipolar Cycloadditions of <i>C</i>-(2-Thiazolyl)nitrones: Application to the Synthesis of a Novel Isoxazolidinyl Analogue of Tiazofurin
作者:Ugo Chiacchio、Antonio Rescifina、Maria G. Saita、Daniela Iannazzo、Giovanni Romeo、Juan A. Mates、Tomas Tejero、Pedro Merino
DOI:10.1021/jo051572a
日期:2005.10.1
The cycloaddition reaction between C-(2-thiazolyl) nitrones and allylic alcohol takes place with complete exo selectivity when the reactions are carried out in the presence of 1 equiv of zinc triflate. The rate of the reaction is increased enormously under microwave irradiation. The use of a chiral dipolarophile allowed application of the methodology to the synthesis of a hitherto unknown enantiomerically
当在1当量的三氟甲磺酸锌存在下进行反应时,C-(2-噻唑基)硝酮与烯丙基醇之间的环加成反应具有完全的外切选择性。在微波辐射下,反应速率大大提高。手性双亲亲油的使用使得该方法学可用于合成迄今未知的对映体纯的C-核苷噻唑林的异恶唑烷基类似物。