MeOTf-Mediated Alkynylation of Selenoamides Leading to β-Methylselenenyl α,β-Unsaturated Ketones and Their Characterization
作者:Toshiaki Murai、Yuichiro Mutoh、Shinzi Kato
DOI:10.1021/ol015968u
日期:2001.6.1
[reaction: see text] beta-Methylselenenyl alpha,beta-unsaturatedketones were effectively synthesized by treating selenoamides with methyl triflate, followed by reaction with lithium acetylides. The reaction proceeded with high stereoselectivity to give exclusively Z-isomers. (77)Se NMR studies and X-ray molecular structure analysis of beta-methylselenenyl alpha,beta-unsaturatedketones suggested that
Collard-Charon,C.; Renson,M., Bulletin des Societes Chimiques Belges, 1963, vol. 72, p. 304 - 315
作者:Collard-Charon,C.、Renson,M.
DOI:——
日期:——
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
Synthesis of N,N-disubstituted selenoamides by O/Se-exchange with selenium–Lawesson's reagent
作者:John Bethke、Konstantin Karaghiosoff、Ludger A. Wessjohann
DOI:10.1016/s0040-4039(03)01690-3
日期:2003.9
The selenium analogue of Lawesson's reagent, [PhP(Se)(mu-Se)](2) is an effective reagent for synthesizing N,N-disubstituted selenoamides. The reaction is carried out under mild conditions (room temperature) and affords the selenoamide in higher yield than using other selenation reagents. (C) 2003 Elsevier Ltd. All rights reserved.