Direct Deoxygenation of α-Hydroxy and α,β-Dihydroxy Ketones Using a Silyl Lithium Reagent
作者:Vishal M. Zade、Laxmikant D. Gangnale、Paresh R. Athawale、D. Srinivasa Reddy
DOI:10.1021/acs.joc.3c01613
日期:2023.10.6
primary, secondary, and tertiary alcohols was carried out with up to 98% isolated yield. Additionally, double deoxygenation was achieved when the present method was applied to α,β-dihydroxy ketones to access the corresponding enones in a single step.
Anchimeric interaction with an sp-hybridized nitrogen cation with iodine affords an isolable acid-base complex. The N−I bonding is non-covalent but rather strong, while the O−I bond of the ligand is ionic and weak, facilitating ligand exchange in the presence of a Brønsted acid. The generated I+ cation species can be employed for α-hydroxylation of ketones.
sp-杂化氮阳离子与碘的嵌合相互作用提供了可分离的酸碱复合物。 N−I 键是非共价键,但相当强,而配体的 O−I 键是离子键且弱,在布朗斯台德酸存在下促进配体交换。生成的 I +阳离子可用于酮的 α-羟基化。