a novel catalyst consisting of ordered mesoporous silica (SBA‐15) functionalized with bis(thiourea) (BTU) linker. The regular and unique pore channels of BTU‐SBA‐15 ensure proper control of the size and homogeneous distribution of palladium nanoparticles. The physiochemical properties of the hybrid Pd@BTU‐SBA‐15 pre‐catalyst were investigated using various techniques. The proposed catalyst is found
Acyl iodides in organic synthesis. Reactions of acetyl iodide with urea, thiourea, and their N,N′-disubstituted derivatives
作者:M. G. Voronkov、N. N. Vlasova、O. Yu. Grigor’eva、L. I. Belousova、A. V. Vlasov
DOI:10.1134/s1070428009040022
日期:2009.4
reacted with urea and its derivatives to give the corresponding N-substituted products. The reactions of acetyl iodide with thiourea, N,N′-dimethylthiourea, imidazolidine-2-thione, and hexahydropyrimidine-2-thione resulted in the formation of S- or N-acetyl derivatives, depending on the temperature and structure of the sulfur functionality (thione or thiol). By contrast, in the reaction of acetyl iodide
乙酰碘与尿素及其衍生物反应,得到相应的N-取代产物。乙酰碘化物与硫脲,N,N'-二甲基硫脲,咪唑烷-2-硫酮和六氢嘧啶-2-硫酮的反应取决于硫官能团的温度和结构而导致形成S-或N-乙酰基衍生物(硫酮或硫醇)。相反,在乙酰碘与N,N′-双(3-三乙氧基甲硅烷基丙基)硫脲的反应中,硅原子上的一个乙氧基被碘置换,形成N- 3-[(二乙氧基)碘甲硅烷基]丙基}-。ñ′-[3-(三乙氧基甲硅烷基)丙基]硫脲。后者在加热下分解,得到3-三乙氧基甲硅烷基丙基异硫氰酸酯和组成为C 45 H 97 IN 6 O 14.5 S 3 Si 6的含硅聚合物。
Voronkov, M. G.; Pestunovich, A. E.; Kositsyna, E. I., Journal of general chemistry of the USSR, 1984, vol. 54, p. 983 - 987
作者:Voronkov, M. G.、Pestunovich, A. E.、Kositsyna, E. I.、Shterenberg, B. Z.、Pushechkina, T. A.、Vlasova, N. N.