Chemistry of oxaziridines. 8. Asymmetric oxidation of nonfunctionalized sulfides to sulfoxides with high enantioselectivity by 2-sulfamyloxaziridines. Influence of the oxaziridine C-aryl group on the asymmetric induction
摘要:
DOI:
10.1021/ja00245a030
作为产物:
描述:
(S)-(-)- α-甲基苄胺 、 苄胺 在
copper(II) on 4-A° molecular sieves 作用下,
以
neat (no solvent) 为溶剂,
反应 14.0h,
以66%的产率得到(S)-N-benzylidene(1-phenylethylamine)
An efficient method for the phosphonation of C=X compounds
作者:A. O. Kolodyazhnaya、O. O. Kolodyazhnaya、O. I. Kolodyazhnyi
DOI:10.1134/s1070363210040055
日期:2010.4
(aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated olefins) in the presence of amines and anilines hydrohalides was studied. We found that pyridine hydrohalides effectively activate the reaction of tralkyl phosphites with various C=X electrophiles: aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated
Asymmetric aza-Diels-Alder reaction: enantio- and diastereoselective reaction of imine mediated by Chiral Lewis acid
作者:Kouji Hattori、Hisashi Yamamoto
DOI:10.1016/s0040-4020(01)80532-9
日期:1993.2
asymmetric aza-Diels-Alder reaction usingchiral boron mediator is developed. The key to its success is the use of the chiral boron complex prepared in situ from (R)- or (S)- binaphthol and B(OPh)3. The enantiomeric reaction of prochiral imine affords products of up to 90% ee. The double asymmetric induction of chiral imine using α-benzylamine as a chiralauxiliary is achieved with almost complete diastereoselectivity
Stereoselective Synthesis of γ-Lactams from Imines and Cyanosuccinic Anhydrides
作者:Darlene Q. Tan、Ashkaan Younai、Ommidala Pattawong、James C. Fettinger、Paul Ha-Yeon Cheong、Jared T. Shaw
DOI:10.1021/ol402554n
日期:2013.10.4
A reaction between imines and anhydrides has been developed with chiral disubstituted anhydrides and chiral imines. The synthesis of highly substituted γ-lactams with three stereogenic centers, including one quaternary center, proceeds at room temperature in high yield and with high diastereoselectivity in most cases. Enantiomerically pure alkyl-substituted anhydrides proceed with no epimerization
General, Green, and Scalable Synthesis of Imines from Alcohols and Amines by a Mild and Efficient Copper-Catalyzed Aerobic Oxidative Reaction in Open Air at Room Temperature
A general, green, and scalablesynthesis of the useful imines and α,β-unsaturated imines is successfully achieved by a low-loading and powerful, mild and efficientcopper-catalyzedaerobicoxidativereaction of alcohols and amines in the openair at roomtemperature under base- and dehydrating reagent-free conditions. This practical reaction can use air as the economic and green oxidant, tolerates
tested as chiral auxiliaries in the stereoselectivesynthesis of β-lactams by condensation of the titanium enolates of 2-pyridyl thioesters with chiral imines. The amines were selected among the following classes of compounds: benzylic amines, β-aminoalcohols, β-heterosubstituted α-aminoesters. Inexpensive and available in both enantiomeric forms α-methylbenzylamine was identified as the chiral auxiliary