A detailed study of tetrathiomolybdate mediated tandem regio- and stereoselective ring opening of aziridine, disulfide formation, reduction of disulfide bond and Michael reaction in a one-pot operation is reported. This constitutes four reactions that take place in one-pot operation. In the reaction of [BnEt3N]4MoS4 with an aziridine derived from cyclohexene and in the absence of Michael acceptor intermediates
一锅操作中,详细报道了四硫代钼酸盐介导的氮丙啶串联区域和立体选择性开环,二硫键形成,二硫键还原和迈克尔反应的详细研究。这构成了一锅操作中发生的四个反应。在[BnEt 3 N] 4 MoS 4的反应中在不存在迈克尔受体的情况下,用衍生自环己烯的氮丙啶的化合物分离并充分表征了磺酰胺基二硫化物和磺酰胺基硫醇。还已经表明,可以在环氧化物存在下选择性地打开氮丙啶环。通过掺入合适的迈克尔受体作为底物的一部分,可以进行分子内的1,4-加成,以高收率合成含硫的无环环状氨基酸酯衍生物和硫代双环[3.3.1]壬烷衍生物。 。
Two-step syntheses of 2,4,6-triisopropylbenzenesulfonyl aziridines
作者:Jianhui Huang、Peter O’Brien
DOI:10.1016/j.tetlet.2005.03.013
日期:2005.5
continuing study on the α-lithiation of N-tosyl aziridines, it is reported that ortho-lithiation of the N-tosyl group is occurring under typical α-lithiation conditions (s-BuLi/PMDETA). Thus, a simple, two-step synthesis of N-2,4,6-triisopropylbenzenesulfonyl aziridines was optimised. The route involves epoxide ring opening using a sulfonamide, mesylation and base-mediated ring closure. The scope and limitations
Desymmetrization ofN-Sulfonated Aziridines by Alkyllithium Reagents in the Presence of Chiral Ligands
作者:Paul Müller、David Riegert、Gérald Bernardinelli
DOI:10.1002/hlca.200490010
日期:2004.1
epoxides. Similarily, the allylic sulfonamide 10, resulting from rearrangement of 7-[(4-methylphenyl)sulfonyl]-7-azabicyclo[4.1.0]heptane (7) under the same reaction conditions, had the (R)-configuration, while cyclohexen-3-ol, obtained upon rearrangement of cyclohexene oxide, is known to be (S)-configured. Deuterium labelling showed that the rearrangement of 7 proceeds via enantioselective α-elimination
Cobalt-Catalyzed Efficient Aziridination of Alkenes
作者:Guang-Yao Gao、Jeremiah D. Harden、X. Peter Zhang
DOI:10.1021/ol050896i
日期:2005.7.1
Cobalt porphyrins are capable of catalyzing the azirldination of alkenes with bromamine-T as the nitrene source. Among cobalt complexes of different porphyrins, Co(TDCIPP) is an effective catalyst that can aziridinate a wide variety of alkenes. The catalytic system can operate at room temperature in a one-pot fashion with alkenes as limiting reagents, forming the desired N-sulfonylated aziridine derivatives in high to excellent yields with NaBr as the byproduct.
Ring Opening of Epoxides and Aziridines with Sodium Azide using Oxone<sup>®</sup>in Aqueous Acetonitrile: A Highly Regioselective Azidolysis Reaction
作者:Gowravaram Sabitha、R. Satheesh Babu、M. Shashi Reddy、J. S. Yadav
DOI:10.1055/s-2002-34848
日期:——
A wide variety of epoxides and aziridines were converted to the corresponding β-azido alcohols and β-azido amines with sodiumazide using Oxone® in aqueous acetonitrile. The reactions were highly regioselective and efficient with excellent yields at room temperature under mild reaction conditions.