氮雜環(huán)卡賓不對(duì)稱催化串聯(lián)反應(yīng)合成四氫萘并吡喃酮衍生物及分子間Stetter反應(yīng)研究
[Abstract]:In this paper, nitrogen-heterocyclic carbene is used as an organic small molecular catalyst, and the reaction of asymmetric catalysis of Michael-lactonization and the inter-molecule Stetter reaction are studied. The paper includes three parts: the first chapter is a review of the progress of the application in the organic synthesis of the base anion intermediate, the benzene, the p-unsaturated alicyclic cation intermediate, the enolate and the high enolase equivalent produced by the azetidine-catalyzed aldehyde compound in the first part. The second chapter uses the nitrogen heterocyclic carbene to catalyze the Michael-Michael-lactonization of the 2-methyl-3,5-dinitrophenyl ketene in a serial reaction with the Michael-Michael-lactone of the 2-methyl-3,5-dinitrophenyl ketene in a symmetric manner, with a medium yield (up to 56%), high diastereoselectivity (25: 1) and enantioselectivity (99% ee) synthesize a tetrahydro-dihydro-pentanone derivative containing three continuous chiral carbons. The asymmetric catalytic series reaction has the advantages of mild condition and good three-dimensional selectivity, and provides a new way for the synthesis of the tetrahydro-methyl-pentanone derivative. In the third chapter, a series of Stetter reaction products were obtained by the inter-molecule Stetter reaction of 2-methylphenyl-phenylcarbamate and 2-cyanogen-1, 1-unsaturated ketone by using N-heterocyclic carbene, and the high diastereoselectivity (25: 1 dr) and the higher yield (up to 80%) were obtained. The compounds have potential application values for the synthesis of benzodiazepines derivatives.
【學(xué)位授予單位】:蘭州大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:O626
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