Eco-friendly H2O2 oxidation of 1,2-dihydroquinazoline-3-oxides to quinazoline-3-oxides
2-Aminobenzaldehyde, 1-(2-aminophenyl)ethanone, and 2-aminophenyl phenyl methanone oximes 1 were reacted with aromatic aldehydes to give the corresponding 1,2-dihydroquinazoline-3-oxides 2. The latter were converted in high yields to a series of quinazoli
Determination the structure of new some imines by physical and chemical methods
This paper is concerned with the preparation of eight new imines by standard methods; These having syn oxime and Schiff base structures. They are derived from aromatic aldehydes with suitable primary amines, depending on their structures. This investigati
Al-Dabbagh, Asmaa B.,Othman, Arwa M.
p. 6181 - 6194
(2021/11/08)
An organocatalytic enantioselective direct α-heteroarylation of aldehydes with isoquinoline: N -oxides
A new protocol for the enantioselective direct α-heteroarylation of aldehydes with isoquinoline N-oxides, via chiral enamine catalysis, has been successfully developed. High enantiomeric excesses and moderate to good yields were achieved for a variety of α-heteroarylated aldehydes.
The synthesis of 1H-indazoles is achieved from o-aminobenzoximes by the selective activation of the oxime in the presence of the amino group. The reaction occurs with a variety of substituted o-aminobenzoximes using a slight excess of methanesulfonyl chloride and triethylamine at 0-23 °C and is amenable to scale-up. The synthesis of 1 H-indazoles under these conditions is extremely mild compared with previous synthetic approaches and affords the desired compounds in good to excellent yields.
Counceller, Carla M.,Eichman, Chad C.,Wray, Brertda C.,Stambuli, James P.
supporting information; experimental part
p. 1021 - 1023
(2009/04/07)
Studies on the reaction of quinazoline 3 oxide with ketone. The transformation of quinazoline 3 oxide into quinoline derivatives
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Higashino,Suzuki,Hayashi
p. 746 - 750
(2007/10/04)
More convenient syntheses 0f o-azidobenzaldehyde and 2-substituted indazoles.
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Schwan,Davis
p. 877 - 878
(2007/10/04)
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