Acyclic Selenoiminium Salts: Isolation, First Structural Characterization, and Reactions
作者:Yuichiro Mutoh、Toshiaki Murai
DOI:10.1021/ol034334f
日期:2003.4.1
[reaction: see text] A variety of selenoiminium salts were obtained by reacting the corresponding selenoamides with methyl triflate at room temperature for 30 s. All of the salts were stable under air. The structures of the selenoiminium salts were determined by X-ray molecular analysis. An aromatic selenoiminium salt reacted with BuLi (3 equiv) to give two types of ketones. In a reaction with LiAlH(4)/Te
selenoamides (2) from nitriles, metallic selenium, carbonmonoxide, water, and amines have been developed on the basis of an amino-group-exchange reaction of in situ formed N-unsubstituted selenoamides (1) with primary or secondary amines. The reactions consist of two processes, i.e., the formation of selenoamides 1 by the reaction of nitriles and H2Se formed from selenium, carbonmonoxide and water, and the subsequent
The selective generation of selenoamide monoanion and dianion was achieved by reacting N-benzyl selenobenzamide with BuLi. Alkylation of the dianion with 1 equiv of electrophile took place at the carbon atom adjacent to the nitrogen atom, and subsequent hydrolysis produced functionalized selenoamides in good to high yields. Ring opening of oxiranes using the dianion proceeded with high regio- and stereoselectivity
A New Synthetic Method for<i>N</i>-Mono- and<i>N,N</i>-Disubstituted Selenoamides
作者:Ming-De Ruan、Pong-Fei Zhang、Yong Tao、Wei-Qiang Fan
DOI:10.1080/00397919608004577
日期:1996.7
N-Mono and N,N-disubstituted selenoamides are synthesized in a one-pot procedure from nitriles, selenium metal and NaBH4 followed by the amine group exchange of the intermediate primary selenoamide with an amine.
Syntheses of new Fe/Se clusters via the reactions of PhC(Se)NHCH2Ph, Et3N and Fe3(CO)12 with electrophiles
作者:Yao-Cheng Shi、Ying Shi、Wei Yang
DOI:10.1016/j.jorganchem.2014.08.033
日期:2014.12
The selenoamide-based route to synthesize new Fe/Se cluster complexes has been investigated. The three-component reaction of PhC(=Se)NHCH2Ph, Et3N and Fe3(C0)12 affords the [Et3NH1+ salt of the [(ttPhC=NCH2Ph)Fe2(C0)6(11-Se)l- cluster anion. The Se-centered cluster anion reacts with PhCH2Br to give (t1-k2C,N-PhC=NCH2Ph)Fe2(C0)6(tt-SeCH2Ph) (1). Furthermore, trapping the Se-centered cluster anion with PPh2CI offers (11-k2C,N-PhC=NCH2Ph)Fe2(C0)6(tt-k2Se,P-SePPh2) (2). Treating the Se-centered cluster anion with CF3CO2H leads to [(tt-k2C,N-PhC=NCH2Ph)Fe2(C0)612(n4-Se2) (3) and [(tt-k2C,N-PhC NCH2Ph)Fe2(C0)6(n4-Se)12Fe2(C0)6 (4). More interestingly, reacting with Fe3(C0)12 forms the [Et3NH1+ salt of the I( tt-PhC NcH2ph)Fe2(C0)6(114-Se)Fe2(C0)6(1-00)1- cluster anion. Treating the tt-CO-containing cluster anion with (1,2-02C6H4)PCI produces (tt-k2C,N-PhC=NCH2Ph)Fe2(C0)6(!14-Se)Fe2(C0)6(1(1,2-02C6F14)P) (5). All the new cluster complexes have been unequivocally determined by X-ray crystallography and completely characterized by microanalyses, IR, 1H NMR, 13C NMR and 775e NMR as well as 31P NMR for 2 and 5. Therefore, the reactions of PhC(=Se)NHCH2Ph, Et3N and Fe3(C0)12, via the MtPhC=NCH2Ph)Fe2(C0)6(ti-Seli cluster anion, with electrophiles demonstrate an unprecedented route to new Fe/Se cluster complexes. (c) 2014 Elsevier BY. All rights reserved.