Approach for the Direct Synthesis of<i>β</i>-Dichlorosubstituted Acetanilides Using Iodine Trichloride (ICl<sub>3</sub>) as the Oxidant and Catalyst
作者:Qing Zhang、Weibing Liu、Cui Chen、Liquan Tan
DOI:10.1002/cjoc.201300007
日期:2013.4
A reliable method for directsynthesis of β‐dichlorosubstituted acetanilides is reported. The key transformation involves the oxidative and catalytic cleavage of a carbon‐carbon bond in the presence of iodinetrichloride (ICl3). In this protocol ICl3 is used not only as the catalyst but also as the oxidant which widely broadens the scope of its application in organic synthetic chemistry.
An efficient and divergent one-pot synthesis of α,α-dihaloamides from readily available β-oxoamides based on the selection of reaction conditions is reported. α,α-Dihalo-β-oxo amides were produced by treating β-oxoamides with N-chlorosuccinimide (NCS) or N-bromosuccinimide (NBS) in water at room temperature, whereas α,α-dihaloacetamides were synthesized by subjecting β-oxoamides to NCS or NBS in
Dichloromeldrum’s Acid (DiCMA): A Practical and Green Amine Dichloroacetylation Reagent
作者:David M. Heard、Alastair J. J. Lennox
DOI:10.1021/acs.orglett.1c00850
日期:2021.5.7
dichloroacetylation of anilines and alkylamines to produce α,α-dichloroacetamides, which are important motifs for medicinal chemistry. Products are formed in good to excellent yields with reagent grade solvents, and, as the only byproducts are acetone and CO2, no column chromatography is required. Thus, this reagent is practical, efficient, and green for the dichloroacetylation of primary amines.
Unexpected Formation of 2,2‐Dichloro‐
<i>N</i>
‐(chloromethyl)acetamides during Attempted Staudinger 2,2‐Dichloro‐β‐lactam Synthesis
作者:Sari Deketelaere、Elias Van Den Broeck、Lore Cools、Daan Deturck、Hannes Naeyaert、Kristof Van Hecke、Christian V. Stevens、Veronique Van Speybroeck、Matthias D'hooghe
DOI:10.1002/ejoc.202100975
日期:2021.11.15
Attempted Staudinger β-lactam synthesis using glyceraldehyde-derived imines resulted in the formation of N-(chloromethyl)acetamides. This unexpected reactivity is observed for specific imine and acid chloride combinations and supported by DFT calculations.
Lewis Base‐Boryl Radicals Promoted Selective Mono‐ and Di‐ Hydrodechlorination of Trichloroacetamides and Acetates
作者:Ming‐Cheng Bo、Yee Lin Phang、Qiang Zhao、Feng‐Lian Zhang、Yi‐Feng Wang
DOI:10.1002/ejoc.202301189
日期:2024.3.18
and N-heterocyclic carbene (NHC)-boryl radicals were found to promote selective mono- or dihydrodechlorination of trichloroacetamides and acetates upon treatment with dilauroyl peroxide (DLP) as radical initiator and thiophenol as polarity reversal catalyst. Substituting the hydrogen atom donor, i. e. Lewis base-borane, to its deuterated counterparts promoted mono- or dideuterodechlorination instead