was obtained and a deprotonation step by t-BuONa is necessary, to yield the corresponding sulfilimine. On the other hand, cyclic sulfilimine of methionine methyl ester, methylthiopropylamine and L methioninol were synthetized in a single step using PIDA. Due to their instability, the sulfilimines were oxidized into corresponding sulfoximine in good yields.
报道了从甲硫氨酸衍生物不对称合成内环甲硫氨酸硫亚胺和亚砜亚胺。环化使用二乙酸苯碘 (PIDA) 进行。在 L-甲硫氨酸的情况下,获得脱氢甲硫氨酸并且需要通过 t-BuONa 进行去质子化步骤,以产生相应的硫亚胺。另一方面,使用 PIDA 一步合成甲硫氨酸甲酯、甲硫基丙胺和 L 甲硫氨醇的环状硫亚胺。由于它们的不稳定性,硫亚胺以良好的产率被氧化成相应的亚砜亚胺。
Analysis and Anti-Helicobacter Activity of Sulforaphane and Related Compounds Present in Broccoli (Brassica oleracea L.) Sprouts
sulforaphane-related compounds were positively identified in the chloroform extract, of which 5-methylsulfinylpentylnitrile was found in the greatest concentration (475.7 mg/kg of fresh sprouts), followed by sulforaphane (222.6 mg/kg) and 4-methylsulfinylbutylnitrile (63.0 mg/kg). Among 18 sulforaphane and relatedcompounds synthesized (6 amines, 6 isothiocyanates, and 6 nitriles), 2 amines, 6 isothiocyanates, and
Jones,D.N. et al., Tetrahedron Letters, 1979, p. 4977 - 4980
作者:Jones,D.N. et al.
DOI:——
日期:——
BELL, B. R.;COTTAM, P. D.;DAVIES, J.;JONES, D. N., J. CHEM. SOC. PERKIN TRANS., 1981, N 7, 2106-2115
作者:BELL, B. R.、COTTAM, P. D.、DAVIES, J.、JONES, D. N.
DOI:——
日期:——
Synthesis of alkenyl sulphoxides by intramolecular and intermolecular addition of sulphenic acids to alkynes
作者:Richard Bell、Peter D. Cottam、John Davies、D. Neville Jones
DOI:10.1039/p19810002106
日期:——
mixture of dioctenyl sulphoxides by way of alkenesulphenic acid–dialkyl sulphine interconversions. Benzenesulphenic acid, methanesulphenic acid, and ethoxycarbonylmethanesulphenic acid, conveniently generated by thermolysis of 1-cyano-2-alkyl(or aryl)sulphinylethanes, underwent intermolecular addition to unactivated and activated alkynes regioselectively to give alkenyl sulphoxides in good yields.