54674-84-9Relevant academic research and scientific papers
Evaluation of bifunctional chiral phosphine oxide catalysts for the asymmetric hydrosilylation of ketimines
Warner, Christopher J.A.,Berry, Sian S.,Jones, Simon
, (2019)
A series of bifunctional phosphine oxides have been prepared and evaluated as catalysts for the trichlorosilane mediated asymmetric hydrosilylation of ketimines. bis-Phosphine oxides, hydroxy-phosphine oxides, and biaryl phosphine oxides all demonstrated good catalytic activity, but poor to moderate enantioselectivity. A bis-P-chiral phosphine oxide displayed the highest enantioselectivity of 60%.
Enantiospecific Synthesis of (-)-Tabtoxinine &β-Lactam
Dolle, Roland E.,Li, Chung-Sing,Novelli, Riccardo,Kruse, Lawrence I.,Eggleston, Drake
, p. 128 - 132 (2007/10/02)
A convergent, 10-step synthesis of optically active tabtoxinine β-lactam has been described.Key features of the synthetic route include (1) preparation of a new γ-cation amino acid synthon, (-)-4, and its use as an electrophile (3 -> 11); (2) the one-pot conversion of methyl sulfide 11 to the Cbz-protected amine 12 via stereoselective sulfilimine rearrangement; and (3) chemoselective lactone ring opening in spiro lactam 15a.Synthons (-)-4 and 3 are available on a semipreparative scale.
