共查询到17条相似文献,搜索用时 78 毫秒
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Dess-Martin高价碘化合物在有机合成中的应用进展 总被引:1,自引:0,他引:1
简单介绍了Dess-Martin高价碘化合物(DMP)的合成方法,重点对DMP在有机合成反应中的最新应用进展进行了概述. 相似文献
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Xuan Cheng Quan Yin Yu-Xuan Jiang Ling-Feng Jiang Si-Yuan Li Yi-Fei Cheng Xin-Chang Sun Lujun Peng Prof. Cheng Zhong Prof. Qing-Hai Deng 《Angewandte Chemie (International ed. in English)》2023,62(18):e202302521
Organic nitrates are broadly applied as pharmaceuticals (acting as efficient nitric oxide donor), energetic materials, building blocks in organic synthesis, etc. However, practical and direct methods to access organic nitrates efficiently are still rare, mainly due to the lack of powerful nitrooxylating reagents. Herein, we report bench-stable and highly reactive noncyclic hypervalent iodine nitrooxylating reagents, oxybis(aryl-λ3-iodanediyl) dinitrates (OAIDNs, 2 ), which are prepared just by using aryliodine diacetate and HNO3. The reagents are used to achieve a mild and operationally simple protocol to access diverse organic nitrates. By employing of 2 , zinc-catalyzed regioselective nitrooxylation of cyclopropyl silyl ethers is realized efficiently to access the corresponding β-nitrooxy ketones with high functional-group tolerance. Moreover, a series of direct and catalyst-free nitrooxylations of enolizable C−H bonds are carried out smoothly to afford the desired organic nitrates within minutes by just mixing the substrates with 2 in dichloromethane. 相似文献
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PEG‐400[poly(ethylene glycol‐400)] is used as a “green” recyclable solvent in the one‐pot synthesis of quinoxalines by reaction with aryl ketones, hypervalent Iodine(III) Sulfonate, and o‐phenylenediamines. Significant rate enhancements and improved yields have been observed. 相似文献
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Dr. Alejandro Parra Dr. Silvia Reboredo 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(51):17244-17260
Chiral hypervalent iodine chemistry has been steadily increasing in importance in recent years. This review catalogues enantioselective transformations triggered by chiral hypervalent iodine(III/V) reagents, in stoichiometric or catalytic quantities, highlighting the different reactivities in terms of yield and enantioselectivity. Moreover, the synthesis of the most remarkable and successful catalysts has been illustrated in detail. 相似文献
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《Helvetica chimica acta》2017,100(5)
A new hypervalent iodine reagent ( 5 ) based on 1,2‐dihydro‐3,3‐dimethyl‐1,2‐benziodoxole containing a 4‐methyl‐7‐tetrafluoroethoxycoumarin unit as a specific UV absorber was prepared and fully characterized, including X‐ray crystal structural analysis. The high reactivity of this compound towards thiols has been exploited for the selective tagging of several targets with the UV chromophore coumarin, including e.g . glutathione. 相似文献
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A new and efficient method for the synthesis of 4‐aryl‐2‐phenyloxazoles is described which is based upon the reaction of α‐[(2,4‐dinitrobenzene)sulfonyl]oxy ketone intermediates with benzamide in ionic liquid. 相似文献
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Florence Malmedy Prof. Dr. Thomas Wirth 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(45):16072-16077
The first stereoselective version of an iodine(III)‐mediated rearrangement of arylketones in the presence of orthoesters is described. The reaction products, α‐arylated esters, are very useful intermediates in the synthesis of bioactive compounds such as ibuprofen. With chiral lactic acid‐based iodine(III) reagents product selectivities of up to 73 % ee have been achieved. 相似文献