Several new organomettalic isoxazoles, silylated and stannylated in the heterocyclic ring or in a side chain have been made. Their 13CNMR spectra are consistent with the previous conclusions on the electronic effects of MR3 and CH2MR3 (M = Si, Sn) groups, and indicate the importance of the pπ-dπ and σ-π mechanisms in the various ring positions.
已经制备了在杂环或侧链中甲硅烷基化和甲锡烷基化的几种新的有机金属异恶唑。其13 C NMR光谱与对MR的电子效应先前结论是一致的3和CH 2 MR 3(M =的Si,Sn)的基团,并注明的重要性p π - d π在和σ-π机制各种环位置。
A New Protocol for the One-Pot Synthesis of Symmetrical Biaryls
作者:Carl F. Nising、Ulrike K. Schmid、Martin Nieger、Stefan Bräse
DOI:10.1021/jo0490393
日期:2004.10.1
Biaryls play an important role in modern organic chemistry. Although a large number of protocols, for the synthesis of symmetrical and unsymmetrical biaryls already exist, most of them are not generally applicable. In our studies toward the total synthesis of the secalonic acids, we were interested in bis(pinacolato)diboron as a reagent for transforming haloarenes into arylboronic esters. By optimizing the reaction conditions, we were able to obtain biaryls containing various functional groups in good to excellent yields.
Gaudiano,G. et al., Gazzetta Chimica Italiana, 1964, vol. 94, p. 393 - 401
作者:Gaudiano,G. et al.
DOI:——
日期:——
NESI R.; RICCI A.; TADDEI M.; TEDESCHI P.; SECONI G., J. ORGANOMETAL. CHEM., 1980, 195, NO 3, 275-283
作者:NESI R.、 RICCI A.、 TADDEI M.、 TEDESCHI P.、 SECONI G.