Iron‐Catalysed Remote C(sp
<sup>3</sup>
)−H Azidation of
<i>O</i>
‐Acyl Oximes and
<i>N</i>
‐Acyloxy Imidates Enabled by 1,5‐Hydrogen Atom Transfer of Iminyl and Imidate Radicals: Synthesis of γ‐Azido Ketones and β‐Azido Alcohols
作者:Rubén O. Torres‐Ochoa、Alexandre Leclair、Qian Wang、Jieping Zhu
DOI:10.1002/chem.201901079
日期:2019.7.17
acetylacetonate [Fe(acac)3], the reaction of structurally diverse ketoxime esters with trimethylsilyl azide (TMSN3) afforded γ‐azido ketones in good to excellent yields. This unprecedented distal γ‐C(sp3)−H bond azidation reaction went through a sequence of reductive generation of an iminyl radical, 1,5‐hydrogen atom transfer (1,5‐HAT) and iron‐mediated redox azido transfer to the translocated carbon radical
Bardhan,J.C. et al., Indian Journal of Chemistry, 1967, vol. 5, p. 100 - 102
作者:Bardhan,J.C. et al.
DOI:——
日期:——
Asymmetric synthesis of spiro 2-pyrrolidin-5-ones, 2-piperidin-6-ones and 1-isoindolin-3-ones. Part 1: N-Acyliminium ion cyclisations with an internal arene nucleophile
作者:Abood A Bahajaj、Madeleine H Moore、John M Vernon
DOI:10.1016/j.tet.2003.10.128
日期:2004.1
A series of chiral non-racemic 5,5- and 5,6-bicyclic lactams is prepared from (R)-phenylglycinol. These are isomerised on treatment with aluminium trichloride in 1,2-dichloroethane to give spiro lactams in high yield and >3:1 diastereoselectivity. From four structures determined by X-ray crystallography, it follows that spiro indenes are formed preferentially with retention of configuration at the spiro carbon atom and spiro naphthalenes with inversion. (C) 2003 Elsevier Ltd. All rights reserved.
Baker's yeast reduction of arylalkyl and arylalkenil γ- and δ-keto acids
gamma- and delta-Lactones 5, 6, 13, 14, 15 and 16 were synthesized via baker's yeast reduction of the corresponding keto acids 3 ,4 and 9-12. The enantioselectivity of the reduction is strongly dependent on the nature of the keto acid: the delta-lactones were always obtained in an ee% higher than the gamma-lactones and ranging from 70% to 100%.
OYAMN UIKU, CHIM. ACTA TURC., 1974, 2, NO 1, 65-81