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。
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。
A Synthetic Route to 2-Alkyl Indoles via Thiophenol-Mediated Ring-Opening of <i>N</i>-Tosylaziridines Followed by Copper Powder-Mediated C–N Cyclization/Aromatization
作者:Masthanvali Sayyad、Yerramsetti Nanaji、Manas K. Ghorai
DOI:10.1021/acs.joc.5b02251
日期:2015.12.18
A simple strategy for the syntheses of 2-alkyl indoles via regioselective ring-opening of 2-(2-haloaryl)-3-alkyl-N-tosylaziridines with thiophenol, followed by copper powder-mediated intramolecular C-N cyclization and subsequent aromatization by the elimination of thiophenol, with good yields is described. Utilizing this protocol, 2-carboxyindole has been synthesized easily.
Synthetic Route to Chiral Indolines via Ring-Opening/C–N Cyclization of Activated 2-Haloarylaziridines
作者:Manas K. Ghorai、Y. Nanaji
DOI:10.1021/jo400287a
日期:2013.4.19
A practical approach for the synthesis of 3-substituted indolines via regio- and stereoselective S(N)2-type ring opening of 2-(2-halophenyl)-N-tosylaziridines with heteroatomic nucleophiles (O, N, and S) followed by palladium catalyzed intramolecular C-N cyclization is reported in excellent yields (up to >99%) and enantiomeric excess (ee 99%)
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。