Quantitative Solid-State Reactions of Amines with Carbonyl Compounds and Isothiocyanates
作者:Gerd Kaupp、Jens Schmeyers、Juergen Boy
DOI:10.1016/s0040-4020(00)00511-1
日期:2000.9
solid anhydrides to give diamides (therefrom imides) or amidic carboxylic salts or imides, with solid imides to give diamides, with solid lactones or carbonates to give functionalized carbamic esters, with polycarbonates to give degradative aminolysis, and with solid isothiocyanates to give thioureas. Diamides give imides by solid-state thermolysis or acid catalysis. Various double, two-step, 3-cascade
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
aryl-isothioureas were prepared in excellent yields (80–97%) by reacting substituted arylthioureas with allylbromide or substituted benzylbromides in the presence of NaH in DMSO at room temperature. The substituent variations on the benzyl reactants had a larger effect on the yields than substituent variations on the allyl reactants. The method provides a facile and convenient preparation of some potentially biologically
在室温下,在 NaH 的 DMSO 中,通过取代芳基硫脲与烯丙基溴或取代苄基溴反应,以极好的收率(80-97%)制备了一系列 16 取代的芳基异硫脲。苄基反应物的取代基变化比烯丙基反应物的取代基变化对产率的影响更大。该方法提供了一些潜在生物活性化合物的简便和方便的制备。