Cu(II)-Ion-Catalyzed Solvolysis of <i>N,N-</i>Bis(2-picolyl)ureas in Alcohol Solvents: Evidence for Cleavage Involving Nucleophilic Addition and Strong Assistance of Bis(2-picolyl)amine Leaving Group Departure
作者:Mei-Ni Belzile、Alexei. A. Neverov、R. Stan Brown
DOI:10.1021/ic500620k
日期:2014.8.4
observed products. The reactions also proceed in other solvents, with the order of reactivity ethanol > methanol >1-propanol >2-propanol > acetonitrile (with 0.2% methanol) > water spanning a range of 150-fold. The mechanism of the reactions is discussed, and the reactivity and mode of cleavage are compared with that of the M(II)-promoted ethanolytic cleavage of a mono-2-picolyl derivative, N-p-nit
用于溶剂分解的动力学和产品ñ - p -nitrophenyl- Ñ ',Ñ ' -双(吡啶-2-基甲基)脲(图7a),Ñ甲基ñ - p -nitrophenyl- Ñ ',Ñ双(吡啶-2-基甲基)尿素(7b)以及在甲醇和甲醇中由Cu(II)离子促进的N-苯基-N ',N'-双(吡啶-2-基甲基)尿素(DPPU)(7c)在s s下研究了乙醇在25°C下控制pH的条件。这些底物的甲醇解和乙醇化反应以底物:金属离子的1:1比例快速进行,在甲醇中Cu(II):7a络合物分解的半衰期约为150分钟,在乙醇中约为15分钟。在所有情况下,反应产物都是双(2-吡啶甲基)胺的Cu(II)配合物和母体苯胺的氨基甲酸O-甲基或O-乙基氨基甲酸酯,这表明裂解点是双(2-吡啶甲基) )—N—C═O键。在每种溶剂中,Cu(II):7b配合物的反应比其各自的Cu(II):7a的反应慢约3-5倍不包括消除机制,该消除机
Synthesis and crystal structure of N-phenyl-N′-(pyridin-2-ylmethyl)-S-methyl-thiouronium iodide
作者:Anja Stojanovic、Cornelia Morgenbesser、Mathea S. Galanski、Daniel Kogelnig、Alexander Roller、Regina Krachler、Bernhard K. Keppler
DOI:10.1016/j.molstruc.2009.11.037
日期:2010.2
Abstract Methylation of N-phenyl-N′-(pyridin-2-ylmethyl)thiourea led to a new low melting thiouronium iodide salt, whereas a further methylation of the nitrogen of the pyridine ring was not successful. This could be explained by the inactivity of the nitrogen atom due to the sterical shielding revealed by crystallographic data. Exchange of the iodide anion with bis(trifluoromethylsulfonyl)imide led
Roecker, Lee; Akande, Janet; Nelson Elam, Inorganic Chemistry, 1999, vol. 38, # 6, p. 1269 - 1275
作者:Roecker, Lee、Akande, Janet、Nelson Elam、Gauga, Irina、Helton, Billy W.、Prewitt, Miranda C.、Sargeson, Alan M.、Swango, Jason H.、Willis, Anthony C.、Xin, Tianpei、Xu, Jun
DOI:——
日期:——
SHOZO, KAMIYA;SHOKO, SUEYOSHI, CHEM. AND PHARM. BULL., 1983, 31, N 5, 1738-1742