1-Methylimidazole 3-N-oxide as a new promoter for the Morita–Baylis–Hillman reaction
摘要:
The Morita-Baylis-Hillman reaction of aldehydes with alpha,beta-unsaturated ketones can be affected by the Lewis bases. We have found that 1-methylimidazole 3-N-oxide promoted the Morita-Baylis-Hiliman reaction of various activated aldehyde compounds in non-solvent system. This is a mild reaction condition and requires no special equipment to give the Morita-BaylisHillman adducts. (C) 2005 Elsevier Ltd. All rights reserved.
Amines<i>vs. N</i>-Oxides as Organocatalysts for Acylation, Sulfonylation and Silylation of Alcohols: 1-Methylimidazole<i>N</i>-Oxide as an Efficient Catalyst for Silylation of Tertiary Alcohols
作者:James I. Murray、Alan C. Spivey
DOI:10.1002/adsc.201500773
日期:2015.12.14
efficiencies of Lewis-basic amines vs. N-oxides for the acylation, sulfonylation and silylation of primary, secondary and tertiary alcohols is reported. Whilst the amines are generally superior to the N-oxides for acylation, the N-oxides are superior for sulfonylation and silylation. In particular, 1-methylimidazole N-oxide (NMI-O) is found to be a highly efficient catalyst for sulfonylation and silylation reactions
1-Methylimidazole 3-N-oxide as a new promoter for the Morita–Baylis–Hillman reaction
作者:Yu-Sheng Lin、Chih-Wei Liu、Thomas Y.R. Tsai
DOI:10.1016/j.tetlet.2005.01.099
日期:2005.3
The Morita-Baylis-Hillman reaction of aldehydes with alpha,beta-unsaturated ketones can be affected by the Lewis bases. We have found that 1-methylimidazole 3-N-oxide promoted the Morita-Baylis-Hiliman reaction of various activated aldehyde compounds in non-solvent system. This is a mild reaction condition and requires no special equipment to give the Morita-BaylisHillman adducts. (C) 2005 Elsevier Ltd. All rights reserved.
Hydroheteroarylation of Unactivated Alkenes Using <i>N</i>-Methoxyheteroarenium Salts
作者:Xiaoshen Ma、Hester Dang、John A. Rose、Paul Rablen、Seth B. Herzon
DOI:10.1021/jacs.7b02388
日期:2017.4.26
reductive coupling of unactivated alkenes with N-methoxy pyridazinium, imidazolium, quinolinium, and isoquinolinium salts under hydrogen atom transfer (HAT) conditions, and an expanded scope for the coupling of alkenes with N-methoxy pyridinium salts. N-Methoxy pyridazinium, imidazolium, quinolinium, and isoquinolinium salts are accessible in 1-2 steps from the commercial arenes or arene N-oxides (25-99%)