O-(3,4,6-tri-O-benzyl-2-deoxy-2-nitro-β-D-glucopyranosyl)-(1->6)-1,2:3,4-di-O-isopropylidene-α-D-galactose

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: O-(3,4,6-tri-O-benzyl-2-deoxy-2-nitro-β-D-glucopyranosyl)-(1->6)-1,2:3,4-di-O-isopropylidene-α-D-galactose
• 英文别名: (1S,2R,6R,8R,9S)-4,4,11,11-tetramethyl-8-[[(2R,3R,4R,5S,6R)-3-nitro-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxymethyl]-3,5,7,10,12-pentaoxatricyclo[7.3.0.02,6]dodecane
• 化学式: C₃₉H₄₇NO₁₂
• 分子量: 721.802
• InChiKey: LEUSDRRBCIRDBT-HGXRBFGMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  52
• 可旋转键数：
  13
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.54
• 拓扑面积：
  138
• 氢给体数：
  0
• 氢受体数：
  12

反应信息

• 作为产物：
  描述：

  3,4,6-tri-O-benzyl-2-nitro-D-glucal 在 N-碘代丁二酰亚胺 、 4 A molecular sieve 、 potassium tert-butylate 作用下， 以 四氢呋喃 、 二氯甲烷 、 甲苯 为溶剂， 反应 1.83h， 生成 O-(3,4,6-tri-O-benzyl-2-deoxy-2-nitro-β-D-glucopyranosyl)-(1->6)-1,2:3,4-di-O-isopropylidene-α-D-galactose
  参考文献：
  名称：

  2-Nitro Thioglycoside Donors:  Versatile Precursors of β-d-Glycosides of Aminosugars

  摘要：

  2-Nitro thioglycosides can be prepared by the Michael addition of thiophenol to 2-nitroglycal derivatives. NIS/TMSOTf activation of these 2-nitro thioglycosides, in the presence of alcohols, rapidly and cleanly led to the desired glycosides in good yield and beta-selectivity. Reduction of the nitro group allowed generation of the corresponding 2-acetamido glycosides.

  DOI：

  10.1021/ol049729t

文献信息

• An Efficient Route toward 2-Amino-β-<scp>d</scp>-galacto- and -glucopyranosides via Stereoselective Michael-Type Addition of 2-Nitroglycals
  作者：Weihua Xue、Jiansong Sun、Biao Yu

  DOI：10.1021/jo900609s

  日期：2009.7.17

  Under the catalysis of DMAP or PPY in CH2Cl2, the Michael-type addition of nucleophiles to 2-nitrogalactal or 2-nitroglucal leads in excellent yields and stereoselectivity to the corresponding β-galacto- or -glucopyranosides, which are ready precursors to the biologically significant β-d-galactosamine and -glucosamine units.

  在CH 2 Cl 2中DMAP或PPY的催化下，亲核试剂向2-硝基半乳糖或2-硝基葡萄糖的迈克尔型加成反应导致相应的β-半乳糖或吡喃葡萄糖苷具有良好的收率和立体选择性，而β-半乳糖或-吡喃葡萄糖苷已是这些化合物的现成物质。具有生物学意义的β- d-半乳糖胺和-葡萄糖胺单元。
• Superbase-Catalyzed Stereo- and Regioselective Glycosylation with 2-Nitroglycals: Facile Access to 2-Amino-2-deoxy-<i>O</i>-glycosides
  作者：Kumar Bhaskar Pal、Aoxin Guo、Mrinmoy Das、Gábor Báti、Xue-Wei Liu

  DOI：10.1021/acscatal.0c00753

  日期：2020.6.19

  An efficient superbase-catalyzed stereo- and regioselective glycosylation of 2-nitroglycals with high functional group compatibility is reported. The ion pair generated from alcohol and a catalytic amount of P-4-t-Bu was vital for the successful implementation of this stereoselective glycosylation under mild conditions, producing moderate to good yields. Under reported reaction conditions, 2-nitrogalactals produce alpha-stereoisomers exclusively, while 2-nitroglucal yielded more beta-products. The notable difference between the outcomes was investigated by the density functional theory (DFT) study. In addition, we have synthesized the key intermediate of a mucin-type core-6 glycoconjugate, thus illustrating the synthetic potency of this method.
• 2-Nitro Thioglycoside Donors:  Versatile Precursors of β-<scp>d</scp>-Glycosides of Aminosugars
  作者：Nadine Barroca、Richard R. Schmidt

  DOI：10.1021/ol049729t

  日期：2004.5.1

  2-Nitro thioglycosides can be prepared by the Michael addition of thiophenol to 2-nitroglycal derivatives. NIS/TMSOTf activation of these 2-nitro thioglycosides, in the presence of alcohols, rapidly and cleanly led to the desired glycosides in good yield and beta-selectivity. Reduction of the nitro group allowed generation of the corresponding 2-acetamido glycosides.