62346-91-2Relevant academic research and scientific papers
Ir-Catalyzed Asymmetric and Regioselective Hydrogenation of Cyclic Allylsilanes and Generation of Quaternary Stereocenters via the Hosomi-Sakurai Allylation
Rabten, Wangchuk,Margarita, Cristiana,Eriksson, Lars,Andersson, Pher G.
supporting information, p. 1681 - 1685 (2018/01/05)
A number of cyclic dienes containing the allylsilane moiety were prepared by a Birch reduction and subjected to iridium-catalyzed regioselective and asymmetric hydrogenation, which provided chiral allylsilanes in high conversion and enantiomeric excess (up to 99 % ee). The compounds were successively used in the Hosomi–Sakurai allylation with various aldehydes employing TiCl4 as Lewis acid, providing adducts with two additional stereogenic centers in excellent diastereoselectivity.
Synthesis and structures of the dinuclear tin(II) complexes [R = Ph, X(Z) = CPh; R = SiMe3, X(Z) = PPh2] and of related compounds
Hitchcock, Peter B.,Lappert, Michael F.,Linnolahti, Mikko,Severn, John R.,Uiterweerd, Patrick G.H.,Wang, Zhong-Xia
experimental part, p. 3487 - 3499 (2010/01/15)
Tin(II) compounds containing the ligands [CH(C6H3Me2-2,5)C(But) NSiMe3]- (≡ L1), [CH(Ph)C(Ph)NSiMe3]- (≡L2), [CH(SiMe3)P(Ph)2NSiMe3]- (≡ L3), {A figure is presented} (≡ L4), [C(Ph)C(Ph)NSiMe3]2- (≡ L5), and [C(SiMe3)P(Ph)2NSiMe3]2- (≡ L6) are reported: the transient SnBr(L1) (1) and SnBr(L2) (2), Sn(L1)2 (3) [P.B. Hitchcock, J. Hu, M.F. Lappert, M. Layh, J.R. Severn, J. Chem. Soc., Chem. Commun. (1997) 1189], the labile Sn(L2)2 (4), [Sn(L5)]2 (5), SnCl(L3) (6), Sn(L3)2 (7), [Sn(L6)]2 (8), Sn(L4)2 (9) and Pb(L4)2 (10). They were prepared from (i) SnBr2 and K(L1) (1, 3) or K(L2) (2, 4, 5); (ii) SnCl2 and Li(L3) (6-9); or (iii) PbCl2 and Li(L4) (10). Each of 1, 3 and 5-10 has been characterised by multinuclear NMR spectra; 3, 5, 6, 8, 9 and 10 by EI-mass spectra, but only 3, 5, 8, 9 and 10 were isolated pure and furnished X-ray quality crystals. Of greatest novelty are the title binuclear fused tricyclic ladder-like compounds 5 and 8. Quantum chemical calculations, on alternative pathways to 5 from 2 and to 8 from 7, are reported.
