一种简单的原子经济方案,通过催化铵基阳离子盐(幻蓝)引发外消旋和非外消旋氮丙啶的 S N 2 型亲核开环转化来构建 C–X/C–C 键。开发了碳亲核试剂,以高达 99% 的收率提供各种氨基醚、硫醚和胺,并且对某些底物具有完美的对映专一性,但对其他底物(对于非外消旋氮丙啶)具有降低的 ee。这种铵自由基-阳离子盐引发的S N 2 型亲核开环策略以及各种环化方案可用于合成各种具有生物学意义的化合物。
Cationic Micelle-catalyzed Ring-Opening Reactions of Aziridines with Thiols in Water
作者:Min Yang、Qin Yang、Puqing Chen、Yiyuan Peng
DOI:10.1002/cjoc.201190112
日期:2011.3
An efficient and practical method is described for the ring‐opening reactions of N‐tosylaziridines with various thiols in water under mild conditions. Various surfactants have been evaluated to optimize the reactions. Under optimal conditions, these reactions gave rise to the corresponding β‐amino sulfides in good to excellent yields.
Pyridine-N-oxide: An Efficient Organocatalyst for Ring-Opening Reactions of Aziridines with Aryl Thiols
作者:Qin Yang、Zhenlan Yin、Min Yang、Yiyuan Peng
DOI:10.1002/cjoc.201190064
日期:2011.1
Pyridine‐N‐oxide serves as an efficient catalyst for the ring‐opening reactions of N‐tosylaziridines with various aryl thiols under mild conditions. This transformation is highly effective, which gives rise to the corresponding β‐amino sulfides in good to excellent yields.
Regioselective Ring-Opening of Aziridines with Thiophenol in the Presence of β-Cyclodextrin in Water
作者:K. Rama Rao、M. Somi Reddy、M. Narender
DOI:10.1055/s-2005-862366
日期:——
In the presence of β-cyclodextrin a variety of N-tosyl aziridines undergo ring-opening by thiophenols to afford the corresponding β-amino thiophenols in high yields with good regioselectivity.
Polyethylene glycol (PEG) as an efficient recyclable medium for the synthesis of β-amino sulfides
作者:Ahmed Kamal、D. Rajasekhar Reddy、Rajendar
DOI:10.1016/j.tetlet.2006.01.086
日期:2006.3
Aziridines undergo ring opening readily with various thiols in the presence of polyethyleneglycol (PEG) to afford the corresponding β-amino sulfides in high yields with good regioselectivity under mild and neutral conditions. The PEG can be recovered and reused.