trans-(±)-2-tert-Butyl-3-phenyloxaziridine: A Unique Reagent for the Oxidation of Thiolates into Sulfenates
摘要:
Aliphatic thiolates were efficiently converted into the corresponding sulfenates by smooth oxidation with trans-(+/-)-2-tert-butyl-3-phenyloxaziridine at room temperature (five examples). Subsequent electrophilic quench with benzyl bromide led to sulfoxides (S-alkylation) in good to moderate yields. Application of the protocol to an aromatic substrate was also successful. This work represents the first valuable example of the use of this poorly active oxidizing agent in synthetic organic chemistry without the need for activating conditions.
Oxidation of a Dimethylplatinum(II) Complex with Oxaziridines: A Hemiaminal Intermediate but No Oxo Complex
作者:Kyle R. Pellarin、Richard J. Puddephatt
DOI:10.1021/om400079b
日期:2013.7.8
The complex [PtMe2(bipy)] (1; bipy = 2,2′-bipyridine) fails to react with the oxaziridine derivatives RCHON-t-Bu (R = H, Ph, 2-pyridyl) in acetone at room temperature, but an easy reaction occurs in methanol solution to give the platinum(IV) complex [Pt(OH)(OMe)Me2(bipy)] and the corresponding imine RCH═N-t-Bu. In the case with R = Ph, the hemiaminal intermediate [Pt(OMe)(OCHPhNH-t-Bu)Me2(bipy)] was
络合物[PtMe 2(bipy)](1; bipy = 2,2'-联吡啶)在室温下无法与丙酮中的恶唑烷衍生物RCHON- t -Bu (R = H,Ph,2-吡啶基)反应,但是在甲醇溶液中容易发生反应,得到铂(IV)络合物[Pt(OH)(OMe)Me 2(bipy)]和相应的亚胺RCH═N- t -Bu 。在R = Ph的情况下,形成半胱氨酸中间体[Pt(OMe)(OCHPhNH- t -Bu )Me 2(bipy)],然后仅缓慢反应形成[Pt(OH)(OMe)Me 2(bipy) )]和PhCH═N- t -Bu 。计算研究表明1的反应与恶唑烷发生反应会产生电荷转移络合物,但进一步的反应需要氢键的协助和与特定甲醇分子的配位。这项工作为以下理论提供了有力的支持:氧原子从二恶英或恶二唑转移至1必须与质子转移耦合并且不涉及氧铂(IV)中间体。
Bulachkova, A. I.; Koldobskii, G. I.; Drozdetskii, A. G., Russian Journal of General Chemistry, 1993, vol. 63, # 4.2, p. 632 - 636
作者:Bulachkova, A. I.、Koldobskii, G. I.、Drozdetskii, A. G.、Tereshchenko, G. F.
DOI:——
日期:——
Is oxygen abstraction by nucleophilic reagents a characteristic reaction of oxaziridines?
作者:Yoshiteru Hata、Masamichi Watanabe
DOI:10.1021/jo00316a025
日期:1981.1
A 3-azacyclopropanespiro-1,2-dioxetane via singlet oxygenation of a methyleneaziridine
作者:Takeshi Akasaka、Yuko Nomura、Wataru Ando
DOI:10.1021/jo00243a013
日期:1988.4
Oxaziridine-silver fluoborate complexes. Site of complexation by carbon-13 nuclear magnetic resonance and x-ray photoelectron spectroscopy
作者:DeLanson R. Crist、Guy J. Jordan、Joseph A. Hashmall