Journal ArticleDOI
A new method for the preparation of substituted 5,6,7,8-tetrahydro-4H-I-benzopyran and 4H-pyrans by vilsmeier -haack reagent.
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TLDR
Substituted 5,6,7,8-tetrahydrO-4H-1-benzopyran and 4H-pyran derivatives were synthesized from their corresponding substituted 1,5 diketones with vilsmeier haack reagent in moderate yields.About:
This article is published in Tetrahedron Letters.The article was published on 1991-07-01. It has received 22 citations till now. The article focuses on the topics: Benzopyran & Reagent.read more
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Journal ArticleDOI
One-Pot Synthesis of Heterocyclic beta-Chlorovinyl Aldehydes Using Vilsmeier Reagent.
TL;DR: 3-Chloro-1H-indole-2-carboxaldehydes are obtained in moderate yields by the one-pot reaction of various substituted 2-[(carboxymethyl)amino]benzoic acids (1a-d) using Vilsmeier reagent (DMF/POCl(3).
Journal ArticleDOI
Intramolecular Cyclization of Azides by Iminium Species. A Novel Method for the Construction of Nitrogen Heterocycles under Vilsmeier Conditions
TL;DR: The susceptibility of the carbonyl group to undergo chloroformylation at room temperature without affecting the azide function was exploited to provide an attractive scheme for the synthesis of alpha-azido-beta-chlorovinyl azides from phenacyl azides.
Journal ArticleDOI
Dimerization of substituted 2-aminobenzoic acids under vilsmeier conditions : a novel route to the synthesis of 4-(3h)-quinazolinones
TL;DR: In this paper, substituted 2-aminobenzoic acids on treatment with Vilsmeier reagent (DMF POCl 3 ) at 80-90°C undergo a novel dirnerization reaction to yield 2-[3,4-dihydro-4-oxo-3-quinazolinoyl]-N,N-dimethyl benzamides.
Reference EntryDOI
The Vilsmeier Reaction of Non‐Aromatic Compounds
TL;DR: The Vilsmeier-Haack reagent can be used to form carbon-oxygen or carbon-nitrogen bonds, unless these are accompanied by formation of a carbon-carbon bond as mentioned in this paper.
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Vilsmeier reagents: Preparation of β-halo-α,β-unsaturated ketones
TL;DR: In this paper, a new method for the preparation of β-chloro and β-bromo-α,β-unsaturated ketones from β-diketones is described.