Electronic and Steric Effects of Alkyl Group on Denitrosation of 3-Alkyl-1-methyl-1-nitrosothioureas
作者:Masayoshi Isobe
DOI:10.1246/bcsj.58.2844
日期:1985.10
According to rate measurements in CH3COOD–D2O, the kinetic isotope effect kH:kD is 1.25 for 4. Except 3, a linear plot of logkR⁄kMe for the denitrosation of RNHCSN(NO)CH3 vs. σ* provides ρ*=−0.98 (r=−0.997). The significant factor affecting the rate-determining step of the denitrosation of these N-nitrosothioureas at pH 4.6 is the electroniceffect of the substituent at the N3 position.
Synthesis of nitrosothioureas. 15N N.m.r. evidence for the formation of thionitrosyl compounds in the nitrosation of thioureas
作者:J. William Lown、Shive M. S. Chauhan
DOI:10.1039/c39810000675
日期:——
Nitrosothioureas may be prepared by treatment of thioureas with NaNO2 in 0·1 N HCl at –5 °C by direct N-nitrosation whereas 15Nn.m.r. studies at –10 °C which employed specifically 15N-enriched compounds revealed the intermediacy of a thionitrosylcompound under more acidic conditions which gave the urea by hydrolysis.
亚硝基硫脲的制备可通过在N-5在0·1 N HCl中通过直接N-亚硝化在0·1 N HCl中用NaNO 2处理,而在–10°C进行的15 N nmr研究中,特别使用15种N富集的化合物揭示硫代亚硝酰基化合物在更酸性的条件下水解生成尿素。
Synthesis of novel-N-nitrosothioureas and examination of their mechanisms of formation by high-field nitrogen-15 and carbon-13 nuclear magnetic resonance spectra of specifically labeled compounds
作者:J. William Lown、Shive M. S. Chauhan
DOI:10.1021/jo00152a019
日期:1983.2
LOWN J. W.; CHAUHAN S. M. S., J. CHEM. SOC. CHEM. COMMUN., 1981, NO 14, 675-676
作者:LOWN J. W.、 CHAUHAN S. M. S.
DOI:——
日期:——
OIRY, J.;MARTINEZ, J.;IMBACH, J. -L.;WINTERNITZ, F., EUR. J. MED. CHEM.-CHIM. THER., 1981, 16, N 6, 539-543
作者:OIRY, J.、MARTINEZ, J.、IMBACH, J. -L.、WINTERNITZ, F.