CAS: 99-61-6; 3-Nitrobenzaldehyde

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2-(3-Nitrophenyl)-1,3-Dithiane置于三氯化铝,1-Benzyl-1-Aza-4-Azoniabicyclo<2.2.2>octane Periodate体系中,化学反应 0.33H,以95%的收率获得产物间硝基苯甲醛
参考文献:使用 1-Benzyl-4-Aza-1-Azoniabicyclo[2.2.2] 辛烷和氯化铝对硫缩醛和硫缩酮进行固态脱除
标题:使用 1-Benzyl-4-Aza-1-Azoniabicyclo[2.2.2] 辛烷和氯化铝对硫缩醛和硫缩酮进行固态脱除
摘要:羰基化合物在有机合成中通常被保护为硫代缩醛和硫代缩酮,因为它们在酸性和碱性条件下都具有稳定性.许多程序可用于制备这些衍生物 3-4 并且已经对这些衍生物脱保护为母体羰基化合物进行了广泛的研究 但是,其中一些脱保护方法需要更高的温度,长的反应时间并且涉及有毒金属离子和对环境有害的溶剂因此,需要一种用于硫缩醛和硫缩酮脱保护的简单,成本更低且更安全的方法.近年来,由于污染少,成本低,过程简单且易于加工,在无溶剂情况下进行的反应越来越受到关注.~ 因为我们对开发无溶剂反应感兴趣我们现在报告 1-Benzyl-4-Aza-L-Azoniabicyclo[2.2.2]octane octane 高碘酸盐 1 作为一种有效且选择性的试剂,用于将硫代缩醛 2 或 3(1,%二硫缩醛和 1,Idithianes)脱保护为相应的羰基化合物4. 1-Benzyl-4-Aza1-Azoniabicyclo[2
DOI:10.1080/00304940509354965

专利信息

专利号:US-5861532-A
优先权日:1997-03-04
标 题:Solid-phase synthesis of N-alkyl amides
发明人：BROWN EDWARD G; NUSS JOHN M
权利人:CHIRON CORP
摘要:Methods for solid phase synthesis of N-alkyl amides comprise reductive amination of carbonyl compounds using a reducing agent and an amine-containing linker bound to a solid support. The methods afford high yields of linker-bound, monoalkylated amines, and subsequent coupling with acid derivatives provide derivatized N-substituted amides in excellent yields after cleavage from the solid-phase. Compositions useful in solid phase synthesis are also described.

专利号:US-11512303-B2
优先权日:2017-05-27
标 题 :Engineered polypeptides and their applications in the synthesis of beta-hydroxy-alpha-amino acids
发明人：CHEN HAIBIN; BONG YONG KOY; XU QING; ZHOU AMENG; SHEN TIANRAN; YANG JIADONG; YANG ZHUHONG
权利人:ENZYMASTER NINGBO BIO ENG CO LTD
摘要:The present invention provides engineered polypeptides that are useful for the asymmetric synthesis of β-hydroxy-α-amino acids under industrial-relevant conditions. The engineered polypeptides disclosed in this invention were developed through directed evolution based on the ability of catalytic synthesis of (2S, 3R)-2-amino-3-hydroxy-3-(4-nitrophenyl) propanoic acid. The present disclosure also provides polynucleotides encoding engineered polypeptides, host cells capable of expressing engineered polypeptides, and methods of producing β-hydroxy-α-amino acids using engineered polypeptides. Compared to other processes of preparation, the use of the engineered polypeptides of the present invention for the preparation of β-hydroxy-α-amino acids results in high purity of the desired stereoisomers, mild reaction conditions, low pollution and low energy consumption. So, it has good industrial application prospects.

专利号:US-6524446-B2
优先权日:2001-03-27
标 题 :Process for synthesis of a porphyrin compound using a molecular sieve catalyst under microwave irradiation
发明人：KULKARNI SHIVANAND JANARDAN; RAGHAVAN KONDAPURAM VIJAYA; MOTKURI RADHA KISHAN; NAGABANDI SRINIVAS
权利人:COUNCIL SCIENT IND RES
摘要:The present invention provides an improved process for synthesis of porphyrin compounds of the general formula 1 n from pyrrole and aromatic aldehyde over zeolite molecular sieve catalysts using microwave heating, (solvent free) to provide an eco-friendly, economical, faster and selective heterogeneous method.

专利号:US-5539117-A
优先权日:1993-04-13
标题:2-acetyl-6-cyanopyridines and their use as intermediates in the synthesis of oligo-2,6-pyridines
发明人：SNOW ROBERT A; DELECKI DANIEL J; SHAH CHANDRA R; HOLLISTER K ROBERT
摘要:The present invention is directed to 2-acetyl-6-cyanopyridine compounds that are useful as intermediates in the synthesis of oligo-2,6-pyridines. The present invention is also directed to new, simpler, less expensive methods for synthesizing such oligopyridines using the novel 2-acetyl-6-cyanopyridine compounds as intermediates.

专利号:US-2022356139-A1
优先权日:2019-09-03
标 题:Synthesis of deuterated aldehydes
发明人：WANG WEI
权利人:ARIZONA BOARD OF REGENTS ON BEHALF OF ATHE UNIV OF ARIZONA
摘要:Described are methods for preparing a deuterated aldehyde using N-heterocyclic carbene catalysts in a solvent comprising D 2 O. The methods may be used to convert a wide variety of aldehydes (e.g., aryl, alkyl, or alkenyl aldehydes) to C-1 deuterated aldehydes under mild reaction conditions without functionality manipulation.

专利号:US-7125983-B2
优先权日:2000-11-29
标题:L-nucleic acid derivatives and process for the synthesis thereof
发明人：IIZUKA HAJIME; TOGASHI KAZUHIKO; SUZUKI TSUNEJI
权利人:MITSUI CHEMICALS INC
摘要:A novel method has been found to produce 2,2′-anhydro-1-(β-L-arabinofuranosyl)thymine as a novel useful intermediate compound. A novel method has been further found to produce thymidine from 2,2′-anhydro-1-(β-L-arabinofuranosyl)thymine. A novel method has been further found to L-2′-deoxyribose derivatives as a useful synthetic intermediate through L-2,2′-anhydro-5,6-dihydrocyclouridine derivative. According to these methods, synthesis of various L-nucleic acid derivatives, synthesis of which has been difficult till now.