A Convenient Synthesis of 2-Acylmethyl-4,4-dimethyl-2-oxazolines. Useful Reagents for β-Keto Ester Synthesis
نویسندگان
چکیده
منابع مشابه
Convenient one-pot synthesis of 2-oxazolines from carboxylic acids.
Simple one-pot methods for preparation of 2-oxazolines have been developed using 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMT-MM). Treatment of a mixture of carboxylic acids and 2-haloethylammonium salts with DMT-MM in methanol followed by refluxing in the presence of KOH gives oxazolines.
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Two complementary iodoarene-catalyzed methods for the preparation of 2-oxazolines are presented. The first involves the cyclization of N-propargylamides and the second involves the cyclization of β-amidoketones. These are proposed to proceed through different mechanisms and have different substrate scopes.
متن کاملSynthesis of 2-Oxazolines by in Situ Desilylation and Cyclodehydration of β-Hydroxyamides.
A powerful method for the synthesis of 2-oxazolines from silyl-protected β-hydroxyamides is reported. Using diethylaminosulfur trifluoride (DAST) or its tetrafluoroborate salt (XtalFluor-E), silyl-protected β-amidoalcohols can be in situ deprotected and dehydrated to give 2-oxazolines in good yields. The utility of this approach was demonstrated by preparing the first reported oligomer of [2,4'...
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Oxazoline is one of the 5 membered heterocycle ring can be synthesized in many ways and various activities like analgesic, antimicrobial and antidiabetic activity are well documented. In the present study analgesic activity screened by tail flick and tail immersion model.The synthesized compounds are ideally characterized spectrophotometrically. Chlorinated and methoxylated oxazolines found to ...
متن کاملN-Sulfonylketenimines as Useful Synthons in a Novel Synthesis of Functionalized 2-Oxoindoline Derivatives
The synthesis of a novel class of 2-oxoindolin-3-ylidene-(1-arylhydrazinyl)-2-aryl(alkyl)ethylidene derivativesvia a copper-catalyzed tandem reaction of isatin, arylhydrazines, sulfonyl azides and terminal alkynes is described.
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1984
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.57.2329