Reaction of N-aryl-beta -amino alcohols with p-toluenesulphonyl chloride under phase transfer catalytic condition gave the corresponding N-aryl aziridines in good yields, whereas N-alkyl-beta -amino alcohol [for e.g., L-ephedrine] gave the corresponding N-tosyl derivative as the major product, along with the expected N-alkyl aziridines in lower yield.
[FeIII(F20-tpp)Cl] Is an Effective Catalyst for Nitrene Transfer Reactions and Amination of Saturated Hydrocarbons with Sulfonyl and Aryl Azides as Nitrogen Source under Thermal and Microwave-Assisted Conditions
作者:Yungen Liu、Chi-Ming Che
DOI:10.1002/chem.201000581
日期:2010.9.10
[FeIII(F20‐tpp)Cl] (F20‐tpp=meso‐tetrakis(pentafluorophenyl)porphyrinato dianion) is an effective catalyst for imido/nitrene insertion reactions using sulfonyl and arylazides as nitrogensource. Under thermal conditions, aziridination of aryl and alkyl alkenes (16 examples, 60–95 % yields), sulfimidation of sulfides (11 examples, 76–96 % yields), allylic amidation/amination of α‐methylstyrenes (15
atom-efficient nitrenetransfer reagents in the (porphyrin)ruthenium-catalyzed amination of olefins. Several azides, olefins and [Ru(porphyrin)CO] complexes were tested to investigate the scope and limits of the reaction. Quantitative yields and short reaction times were achieved by using terminal olefins and aryl azides bearing electron-withdrawing groups on the aryl moiety. The reactions were influenced
TPPH2/TBACl‐catalyzed (TPPH2=dianion of tetraphenyl porphyrin; TBACl=tetrabutyl ammonium chloride) carbon dioxide cycloaddition to N‐aryl aziridines was successful in synthesizing N‐aryl oxazolidin‐2‐ones. A catalytic tandem reaction was also developed, in which N‐aryl aziridines were initially synthesized and then reacted with carbon dioxide without being purified. The procedure occurred with a very
CoII(tpp) catalyzes the reaction of aromatic azides (ArN3) with nonactivated olefins to yield allylic amines or aziridines in moderate-to-good yields. The chemoselectivity of the catalytic reaction is particularly high. Depending on the substrate employed, allylic amines or aziridines can be obtained. The reaction mechanism was investigated, and the reaction proceeds through reversible coordination
The covalently heterogenisation of a free-base porphyrin on SBA-15silica yielded TPPH2@SBA-15 (TPPH2 = tetraphenyl porphyrin), which was very efficient to promote the CO2 cycloaddition to three-membered rings. The TPPH2@SBA-15/TBAX-based catalytic procedure was very general, as revealed by excellent activities registered in the reaction of CO2 with epoxides, N-alkyl and N-aryl aziridines, forming