Synthesis of Tetrazole-Derived Organocatalysts via Azido-Ugi Reaction with Cyclic Ketimines
作者:Olga I. Shmatova、Valentine G. Nenajdenko
DOI:10.1021/jo401428q
日期:2013.9.20
A newroute to tetrazole-derived cyclic amines based on the TMSN3-modified Ugi reaction with 2-substituted cyclic imines was elaborated. The reaction allows the direct preparation of five-, six-, and seven-membered cyclic amines substituted with a tetrazole ring, which are important types of organocatalysts. The scope and limitations of this method are discussed. In the case of the Ugi reaction with
A novel convenient approach to the synthesis of 2-substituted analogs of ornithine and homolysine
作者:V. G. Nenajdenko、E. P. Zakurdaev、E. V. Prusov、E. S. Balenkova
DOI:10.1007/s11172-005-0204-9
日期:2004.12
A novel efficient method for the synthesis of earlier unknown 2-substituted analogs of ornithine and homolysine from substituted 5-aminopentyl- and 3-midopropylhydantoins (prepared from cyclic imines and amino and amido ketones) was developed. Hydrolysis of hydantoins with a solution of Ba(OH)2 gave the target amino acids in high yields.
The reaction of cyclic imines with the Ruppert–Prakash reagent. Facile approach to α-trifluoromethylated nornicotine, anabazine, and homoanabazine
作者:Nikolay E. Shevchenko、Katja Vlasov、Valentine G. Nenajdenko、Gerd-Volker Röschenthaler
DOI:10.1016/j.tet.2010.11.032
日期:2011.1
We have demonstrated that the Ruppert-Prakash reagent is able to react with a number of cyclic imines under acidic condition to afford the corresponding alpha-trifluoromethyl derivatives of nitrogen heterocycles. 5-7-Membered cyclic imines bearing various alkyl, aryl or heterocyclic group were successfully involved in this transformation. Novel trifluoromethylated analogues of nicotine, anabasine, and homoanabasine alkaloids were synthesized. (C) 2010 Elsevier Ltd. All rights reserved.
Reaction of organolithium reagents with lactim ethers: preparation of cyclic 2-alkyl imines or 2,2-dialkyl amines
作者:Charles A. Zezza、Michael B. Smith、Betsy A. Ross、Akwasi Arhin、Patricia L. E. Cronin
DOI:10.1021/jo00197a013
日期:1984.11
ZEZZA, CH. A.;SMITH, M. B.;ROSS, B. A.;ARHIN, AKWASI;CRONIN, P. L. E., J. ORG. CHEM., 1984, 49, N 23, 4397-4399
作者:ZEZZA, CH. A.、SMITH, M. B.、ROSS, B. A.、ARHIN, AKWASI、CRONIN, P. L. E.