66896-69-3Relevant articles and documents
Efficient tandem process for the catalytic deprotection of N-allyl amides and lactams in aqueous media: A novel application of the bis(allyl)- ruthenium(IV) catalysts [Ru(η3:η2: η3-C12H18)Cl2] and [Ru(η3:η3-C10H16)-(μ-Cl) Cl}2]
Cadierno, Victorio,Gimeno, Jose,Nebra, Noel
, p. 6590 - 6594 (2007)
An operationally simple and highly efficient methodology for the removal of the allyl protecting group in amides and lactams has been developed by using the commercially available bis(allyl)-ruthenium(IV) catalysts [Ru(η3:η2:η3-C12H 18)Cl2] (C12H18 = dodeca-2,6,10-triene-1,12-diyl) and [(Ru(η3:η3- C10H16)(μ-Cl)Cl}2] (C10H 16 = 2,7-dimethylocta-2,6-diene-1,8-diyl). The tandem process, which takes place in aqueous media and proceeds in a one-pot manner, involves the initial isomerization of the C=C bond of the allyl unit and subsequent oxidative cleavage of the resulting enamide.
Chromium-Catalyzed Asymmetric Dearomatization-Addition Reactions of Halomethyloxazoles and Indoles
Wang, Zheng,Ji, Hongtao,He, Wei-Min,Xiong, Yang,Zhang, Guozhu
supporting information, p. 4915 - 4921 (2018/06/08)
The asymmetric dearomatization-addition reaction of halomethyloxazoles and halomethylindoles with aldehydes is realized in the presence of a carbazole-based bisoxazoline CrCl 2 complex to afford the corresponding enantioenriched, hydroxylated oxazoline and indoline products. The observed excellent chemo-, regio-, diastereo- and enantioselectivities are notable advantages of this protocol. The strategy established in this study is expected to find application in the synthesis of azaheterocycles with biological significance and useful functionalities.
Site-Selective Silylation of Aliphatic C-H Bonds Mediated by [1,5]-Hydrogen Transfer: Synthesis of α-Sila Benzamides
Liu, Pei,Tang, Jinghua,Zeng, Xiaoming
, p. 5536 - 5539 (2016/11/17)
The first example of site-selective silylation of C(sp3)-H bonds mediated by a [1,5]-hydrogen transfer is reported. This reaction occurs selectively at the α-position of benzamides with a combination of tert-butylmagnesium chloride and a catalytic amount of 4,4′-di-tert-butylbipyridine (dtbpy) ligand and provides a facile route for the creation of biologically interesting α-sila benzamides. Late-stage functionalization of the incorporated silyl moieties facilitates the synthesis of N-formyl, cis-enamine, β-hydroxyl, amino, and pyrrole-containing derivatives.