Visible Light-Mediated C(sp<sup>2</sup>)–H Selenylation of Amino Pyrazole and Amino Uracils in the Presence of Rose Bengal as an Organophotocatalyst
作者:Danish Ali、Tasneem Parvin、Lokman H. Choudhury
DOI:10.1021/acs.joc.1c02565
日期:2022.1.21
arylselenoethers by a catalyst-free one-pot three-component reaction. The notable features of this methodology are metal-free reaction conditions, good to very good yields, use of an organic photocatalyst, and wide substrate scope; it is also applicable to gram-scale synthesis and provides selenoethers of medicinally important heterocycles such amio-pyrazole, isoxazole, isothiazole, and uracils.
在此,我们报道了一种通过 C(sp 2 ) 合成氨基吡唑和氨基尿嘧啶的烷基、苄基和苯基硒醚的有效方法。)–H 官能化在可见光和玫瑰红作为有机光催化剂存在下。氨基吡唑/异噻唑/异恶唑或氨基尿嘧啶与 0.5 当量的二苯基/二苄基/二乙基二硒化物在可见光存在下,在乙腈介质和催化量的玫瑰红中反应,得到相应的苯基、苄基或乙基硒醚。到非常好的产量。我们还利用一些硒化氨基吡唑通过无催化剂的一锅三组分反应制备与芳基硒醚结合的吡唑稠合二氢嘧啶。该方法的显着特点是无金属反应条件、良好至非常好的产率、使用有机光催化剂和广泛的底物范围;