Sulphated zirconia is an efficient catalyst for the regioselective ring-opening of aryl-substituted aziridines. This heterogeneous catalyst can be used several times without loss of activity and is compatible with a variety of acid sensitive and slightly basic nucleophiles.
Studies on ring cleavage of aziridines with hydroxyl compounds
作者:B.A Bhanu Prasad、Rashmi Sanghi、Vinod K Singh
DOI:10.1016/s0040-4020(02)00609-9
日期:2002.9
Ringcleavage of a variety of N-substituted aziridines has been studied with hydroxyl compounds (primary, secondary, allylic and tertiary). It was observed that the cleavage reaction was very facile in the presence of BF3·OEt2 and Sn(OTf)2. Whereas the aziridine opening reaction was facile with primary and secondary alcohols, hindered alcohols took longer (2 days). However, with the help of microwave
Catalytic Aminium Radical-Cation Salt (Magic Blue)-Initiated S<sub>N</sub>2-Type Nucleophilic Ring-Opening Transformations of Aziridines
作者:Bharat Singh、Suraj Kashyap、Shishir Singh、Sikha Gupta、Manas K. Ghorai
DOI:10.1021/acs.joc.3c02194
日期:2024.2.16
SN2-type nucleophilicring-opening transformations of racemic and nonracemic aziridines with different hetero and carbon nucleophiles to afford various amino ethers, thioethers, and amines in up to 99% yield, and with perfect enantiospecificity for some substrates but reduced ee with others (for nonracemic aziridines), is developed. This aminium radical-cation salt-initiated, SN2-type nucleophilic ring-opening
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。
Kumar, G. D. Kishore; Baskaran, Sundarababu, Synlett, 2004, # 10, p. 1719 - 1722