A modular approach to the synthesis of 1,4,5-substituted-2-aminoimidazoles
摘要:
Diversified 1,4,5-substituted-2-aminoimidazoles were rapidly assembled via sequential N-H insertion and Grignard addition to alpha-diazoesters. Lead compounds were identified as antibiotics against Gram-positive bacteria with an MIC value as low as 2 mu g/mL. (C) 2011 Elsevier Ltd. All rights reserved.
A modular approach to the synthesis of 1,4,5-substituted-2-aminoimidazoles
摘要:
Diversified 1,4,5-substituted-2-aminoimidazoles were rapidly assembled via sequential N-H insertion and Grignard addition to alpha-diazoesters. Lead compounds were identified as antibiotics against Gram-positive bacteria with an MIC value as low as 2 mu g/mL. (C) 2011 Elsevier Ltd. All rights reserved.
Ligand‐Controlled Copper‐Catalyzed Regiodivergent Carbonylative Synthesis of α‐Amino Ketones and α‐Boryl Amides from Imines and Alkyl Iodides
作者:Fu‐Peng Wu、Xiao‐Feng Wu
DOI:10.1002/ange.202012251
日期:2021.1.11
AbstractRegioselective transformation is among the long‐standing challenges in organic synthesis. In this communication, a copper‐catalyzed selectivity controlled regiodivergent borocarbonylation of imines with alkyl iodides has been developed. Various α‐amino ketones and α‐boryl amides were produced in moderate to good yields from the same substrates. The choice of the ligand is key for the regioselectivity
α,β-Epoxy Sulfoxides as Useful Intermediates in Organic Synthesis. III. A Novel Synthesis of α-Amino Ketones and α-Amino Aldehydes by Aminolysis of α,β-Epoxy Sulfoxides
prepared from 1-chloroalkyl phenyl sulfoxides or chloromethyl phenyl sulfoxide and carbonyl compounds, with alkyl- or arylamines afforded α-amino ketones or α-amino aldehydes in good yields. Treatment of thus obtained α-arylamino ketones with weak Lewis acid led to 2,3-disubstituted indoles.
Various kinds of α-aminoketones and α-arylamino ketones are synthesized in good yields by aminolysis of α,β-epoxy sulfoxides which are easily prepared from alkylated chloromethyl phenyl sulfoxide and carbonyl compounds.