An environmentally benign, simple and highly efficient protocol for the synthesis of S-arylisothiourea derivatives has been achieved in good to excellent yields by reacting a series of aryliodides with arylthioureas, using inexpensive CuSO4·5H2O as catalyst in water without PTC (phase transfer catalyst). The protocol features easy performance, good to excellent yields, good tolerance towards a variety
and pharmaceutical compounds. A convenient and efficient copper-catalyzed S-arylation of arylthioureas usingdiaryliodoniumsalts is reported. The desired arylisothioureas were synthesized in good yields in the presence of CuCl as catalyst and K2CO3 as base, and a wide variety of functional groups on the arylthioureas and diaryliodoniumsalts were tolerated. The protocol affords an alternative synthesis
摘要 报道了使用二芳基碘鎓盐方便且有效的铜催化的芳基硫脲的S-芳基化。在作为催化剂的CuCl和作为碱的K 2 CO 3的存在下,以高收率合成了所需的芳基异硫脲,并且可以耐受芳基硫脲和二芳基碘鎓盐上的多种官能团。该协议提供了一些潜在有用的生物和药物化合物的替代合成方法。 报道了使用二芳基碘鎓盐方便且有效的铜催化的芳基硫脲的S-芳基化。在作为催化剂的CuCl和作为碱的K 2 CO 3的存在下,以高收率合成了所需的芳基异硫脲,并且可以耐受芳基硫脲和二芳基碘鎓盐上的多种官能团。该协议提供了一些潜在有用的生物和药物化合物的替代合成方法。
An Efficient Chan-Lam <i>S</i>
-Arylation of Arylthioureas with Arylboronic Acids
A convenient and efficient protocol has been developed for the preparation of aryl-isothioureas based on the Chan-Lam C-S couplingreaction. The desired aryl-isothioureas were synthesized in good yields (up to 95%) in the presence of Cu(OAc)(2)H2O as catalyst and bipyridine as ligand. A variety of functional groups on the aryl-thiourea and arylboronic acid reagents are tolerated. The method features
Copper-Catalyzed and Air-Mediated Mild Cross-Dehydrogenative Coupling of Aryl Thioureas and Dialkyl<i>H</i>-Phosphonates: The Synthesis of Thiophosphonates
A copper-catalyzed and air-mediated mild cross-dehydrogenative coupling of arylthioureas and dialkyl H-phosphonates to produce thiophosphonates has been reported. Without addition of base or acid, air as an oxidant, the phosphorylation occurred smoothly to give the target products in moderate to excellent yields at room temperature. The protocol allows the direct formation of a sulfur–phosphorus bond
thioureas for stereoselectivesynthesis of (Z)-vinyl sulfides has been reported. Vinyl thioethers were obtained without a metal catalyst in good yields via anti-Markovnikov and cis addition. The protocol features a broad substrate scope of the starting materials, high atom economy, good yields, and exclusive stereoselectivity, showing potential synthetic value for the synthesis of a diversity of (Z)-vinyl
已经报道了无金属的 Cs 2 CO 3促进炔烃与芳基硫脲的氢硫醇化反应,用于立体选择性合成 ( Z )-乙烯基硫化物。通过反马尔科夫尼科夫和顺式加成,在没有金属催化剂的情况下以良好的产率获得乙烯基硫醚。该协议具有广泛的起始材料底物范围、高原子经济性、良好的产率和独特的立体选择性,显示了合成多种 ( Z )-乙烯基硫醚的潜在合成价值。