ethyl 4,5:7,8-di-O-isopropylidene-3-deoxy-α-D-manno-2-octulopyranosonate | 127244-80-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 4,5:7,8-di-O-isopropylidene-3-deoxy-α-D-manno-2-octulopyranosonate
• 英文别名: ethyl 4,5:7,8-di-O-isopropylidene-3-deoxy-β-D-manno-2-octulopyranosonate；ethyl (3aR,4R,6R,7aR)-4-[(4R)-2,2-dimethyl-1,3-dioxolan-4-yl]-6-hydroxy-2,2-dimethyl-3a,4,7,7a-tetrahydro-[1,3]dioxolo[4,5-c]pyran-6-carboxylate
• CAS: 127244-80-8
• 化学式: C₁₆H₂₆O₈
• 分子量: 346.378
• InChiKey: MXABGVWHBVAGBF-JXOGKFFTSA-N

物化性质

• 沸点：
  415.5±45.0 °C(Predicted)
• 密度：
  1.216±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.4
• 重原子数：
  24
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.94
• 拓扑面积：
  92.7
• 氢给体数：
  1
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  ethyl 4,5:7,8-di-O-isopropylidene-3-deoxy-α-D-manno-2-octulopyranosonate 在 sodium hydroxide 、 溶剂黄146 作用下， 生成 3-deoxy-α-D-manno-oct-2-ulosonic acid
  参考文献：
  名称：

  Asymmetric Syn-Selective Aldol Reactions of γ-Oxygenated Vinylogous Urethane with a Second Generation Chiral Auxiliary:  Application in Construction of (+)-3-Deoxy-d-manno-2-octulosonic Acid

  摘要：

  Various examples of highly diastereoselective aldol reactions are presented where the nonracemic lithium enolate 6 derived from a C4-oxygenated vinylogous urethane reacts in syn fashion to provide upon intramolecular lactonization useful gamma-alkoxy-delta-lactone synthons 12a-f. In one particular example, the result of reaction with an acrolein surrogate, the lactone product 12e is applied in an efficient asymmetric synthesis of(+)-KDO (10 steps, 34% overall yield). Notable transformations include (1) hydrolysis of the vinylogous urethane functionality, (2) stereoselective reduction of the resulting beta-keto-lactone 2, (3) stereoselective dihydroxylation of the vinyl side chain of delta-lactone 17, and (4) addition of alpha-ethoxy-vinyllithium to the lactone carbonyl of 19 to procure the aldulosonic acid residue in 1 upon ozonolysis.

  DOI：

  10.1021/jo981916f
• 作为产物：
  描述：

  (3S,4S)-5-keto-4-<β-(trimethylsilyl)ethoxy>-3-vinyloxacyclohexan-2-one 在 甲醇 、 sodium tetrahydroborate 、 四氧化锇 、 N-甲基吲哚酮 、 cerium(III) chloride 、 二甲基硫 、 Celite 、 三氟化硼乙醚 、 叔丁基锂 、 4-甲基苯磺酸吡啶 、 臭氧 、 silver carbonate 作用下， 以 四氢呋喃 、 水 、 N,N-二甲基甲酰胺 、 丙酮 、 叔丁醇 、 苯 为溶剂， 反应 27.0h， 生成 ethyl 4,5:7,8-di-O-isopropylidene-3-deoxy-α-D-manno-2-octulopyranosonate
  参考文献：
  名称：

  Asymmetric Syn-Selective Aldol Reactions of γ-Oxygenated Vinylogous Urethane with a Second Generation Chiral Auxiliary:  Application in Construction of (+)-3-Deoxy-d-manno-2-octulosonic Acid

  摘要：

  Various examples of highly diastereoselective aldol reactions are presented where the nonracemic lithium enolate 6 derived from a C4-oxygenated vinylogous urethane reacts in syn fashion to provide upon intramolecular lactonization useful gamma-alkoxy-delta-lactone synthons 12a-f. In one particular example, the result of reaction with an acrolein surrogate, the lactone product 12e is applied in an efficient asymmetric synthesis of(+)-KDO (10 steps, 34% overall yield). Notable transformations include (1) hydrolysis of the vinylogous urethane functionality, (2) stereoselective reduction of the resulting beta-keto-lactone 2, (3) stereoselective dihydroxylation of the vinyl side chain of delta-lactone 17, and (4) addition of alpha-ethoxy-vinyllithium to the lactone carbonyl of 19 to procure the aldulosonic acid residue in 1 upon ozonolysis.

  DOI：

  10.1021/jo981916f

文献信息

• Synthesis of Butenolides via a Horner–Wadsworth–Emmons Cascading Dimerization Reaction
  作者：Jack Everson、Milton J. Kiefel

  DOI：10.1021/acs.joc.9b02015

  日期：2019.12.6

  structurally related butenolides has been observed while we were exploring the substrate-scope of a Horner-Wadsworth-Emmons (HWE) reaction. While aliphatic aldehydes gave the expected HWE product, aromatic aldehydes furnished butenolides, resulting from the dimerization of the HWE product during desilylation of the initially formed HWE adduct. In addition to isolating butenolides in a high yield, we

  在我们研究霍纳-沃兹沃思-埃蒙斯（HWE）反应的底物范围时，已观察到一系列结构相关的丁烯内酯的有效合成。尽管脂族醛提供了预期的HWE产物，但芳族醛提供了丁烯内酯，这是由于在最初形成的HWE加合物的甲硅烷基化过程中HWE产物的二聚作用所致。除了高产率地分离丁烯内酯外，我们还精确地确定了二聚化发生的时间。
• Condensation of D-mannosaldehyde derivatives with ethyl diazoacetate. An easy and stereoselective chain elongation methodology for carbohydrates: Application to new syntheses for KDO and 2-deoxy-β-KDO
  作者：Fidel J López-Herrera、Francisco Sarabia-García

  DOI：10.1016/s0040-4020(97)00056-2

  日期：1997.3

  (3R and 3S) beta-Hydroxy-alpha-diazocarbonyl compounds 4(100%, 3:2), 9 (35%, 100:0), 14 (74%, 7:2) and 18 (100%. 100:0), prepared from 2,3,4.5.6-penta-O-acetyl- (3), penta-O-benzyl- (8), 2.3:5,6-di-O-isopropylidene-4-O-(tert-bulyldimethylsilyl)- (13), and 2.3:5,6-di-0-isopropylidene-4-0-acetyl-D-mannosaldehyde (17), respectively, were acetylated, and the resulting beta-ncetoxy-alpha-diazocarbonpl compounds treated with rhodium diacetate to give the corresponding-alpha-enolesters,6 (100%). 11 (35%), 16(100%)and 20 (100%),which are potentially alpha-ketoesiers. Molecularmechanics calculations were used in order to justify the stereoselectivity observed in the initial addition process. The problematic removal of the protecting groups from the alpha-keto esters is discussed. Finally, hydrazinolysis of the cc-enol acetates (to quench the labile resulting a-keto ester as the corresponding and less reactive hydrazines), mild oxidation to the corresponding alpha-diazoesters, deprotection, and final oxidation of the diazo group with m-chloroperhenzoic acid, gave KDO in good yield. Intermediate products were used in the completely stereoselective synthesis of 2-deoxy-beta-KDO, a potent inhibitor for CMP-KDO synthetase. (C) 1997 Published by Elsevier Science Ltd.

  三氢群（3R和3S）的β-羟基-α-重氮甲酰化合物4（100%，3:2）、9（35%，100:0）、14（74%，7:2）和18（100%，100:0），分别由2,3,4,5,6-五-O-乙酰基-（3）、五-O-苄基-（8）、2,3,5,6-二-O-异丙基二酮基-4-O-(叔丁基二甲基硅基)-（13）、以及2,3,5,6-二-O-异丙基二酮基-4-O-乙酰基-D-甘醛（17）制备而成，随后这些化合物被乙酰化。得到的β-乙酰氧基-α-重氮甲酰化合物经二乙酸铑处理，生成相应的α-烯醇酯6（100%）、11（35%）、16（100%）和20（100%），这些化合物可能是α-酮酸酯。为了验证初始加成过程中观察到的立体选择性，进行了分子力学计算。文中讨论了从α-酮酸酯中去除保护基团的难点。最后，通过肼解α-烯醇乙酰酯（以淬灭不稳定的产物α-酮酸酯，生成相应的羟胺，活性较低），进行温和氧化生成对应的α-重氮酸酯，解保护，并最终使用邻氯过苯甲酸氧化重氮基团，成功制得KDO，产量良好。中间产物被用于完全立体选择性合成2-去氧-β-KDO，该化合物是CMP-KDO合成酶的强效抑制剂。 （C）1997 由Elsevier Science Ltd出版。
• Efficient Large Scale Syntheses of 3-Deoxy-<scp>d</scp>-manno-2-octulosonic acid (Kdo) and Its Derivatives
  作者：Yingle Feng、Jie Dong、Fangyuan Xu、Aiyun Liu、Li Wang、Qi Zhang、Yonghai Chai

  DOI：10.1021/acs.orglett.5b00901

  日期：2015.5.15

  An efficient method to rapidly synthesize 3-deoxy-d-manno-2-octulosonic acid (Kdo) and its derivatives in large scale has been developed. Starting from d-mannose, the di-O-isopropylidene derivative of Kdo ethyl ester was prepared in three steps on a scale of more than 40 g in one batch in an overall yield of 75–80% without any intermediate purification. Kdo, Kdo glycal, and 2-acetylated Kdo ester were

  快速高效的方法合成3-脱氧d -manno -2-辛酮糖酸（KDO）及其在大规模衍生物已被开发。从d-甘露糖开始，分三批以超过40 g的规模分三步制备Kdo乙酯的二-O-异亚丙基衍生物，总产率为75-80％，无需任何中间纯化。由Kdo乙酯的二-O-异亚丙基衍生物快速高产率地合成了Kdo，Kdo糖基和2-乙酰化的Kdo酯。通过使用t - BuOH作为质子源，通过α-异构体的差向异构化，以高立体选择性获得2-脱氧-β-Kdo酯。
• Stereocontrolled Synthesis of the Equatorial Glycosides of 3-Deoxy-<scp>d</scp>-manno-oct-2-ulosonic Acid: Role of Side Chain Conformation
  作者：Philemon Ngoje、David Crich

  DOI：10.1021/jacs.0c03215

  日期：2020.4.29

  relationship of the bacterial sialic acid, pseudaminic acid, and 3-Deoxy-D-manno-oct-2-ulosonic acid (KDO) affords the hypothesis that suitably protected KDO donors will adopt the trans,gauche conformation of their side chain and consequently be highly equatorially selective in their coupling reac-tions conducted at low temperature. This hypothesis is borne out by the synthesis, conformational analysis, and

  细菌唾液酸、伪胺酸和 3-Deoxy-D-manno-oct-2-ulosonic acid (KDO) 的假对称关系提供了这样一个假设，即适当保护的 KDO 供体将采用其侧链的反式、gauche 构象和因此，它们在低温下进行的耦合反应中具有高度的赤道选择性。这一假设得到了在 -78 °C 下在二氯甲烷中偶联全-O-乙酰基或苄基保护的 KDO 供体时所见的合成、构象分析和出色的赤道选择性所证实。对糖基化反应的机理理解正在推进到可以进行选择性预测的阶段。在这种情况下，
• Concise synthesis of 3-deoxy-d-manno-oct-2-ulosonic acid (KDO) as a protected form based on a new transformation of α,β-unsaturated ester to α-oxocarboxylic acid ester via diol cyclic sulfite
  作者：Atsuhito Kuboki、Toshihiro Tajimi、Yoshihide Tokuda、Dai-ichiro Kato、Takeshi Sugai、Susumu Ohira

  DOI：10.1016/j.tetlet.2004.04.016

  日期：2004.5

  (overall 65% yield). The key step is the efficient transformation of readily available α,β-unsaturated ester to α-oxocarboxylic acid ester. The newly β-elimination of the corresponding diol cyclic sulfite and the in situ trap (DBU/TMSCl) into enol silyl ether was developed to give the tautomeric equivalent of α-oxocarboxylic acid ester. The deprotection of acid labile TMS ether provided the desired product

  通过5个步骤（总收率65％）从2,3：5,6-二-O-异亚丙基-α-d-甘露呋喃糖（3）进行了KDO（1）的简明合成，作为适当保护的形式（2）。。关键步骤是将容易获得的α，β-不饱和酯有效转化为α-氧代羧酸酯。开发了新的β-消除相应的二醇环亚硫酸盐和原位捕集器（DBU / TMSCl）进入烯醇甲硅烷基醚的方法，得到了α-氧代羧酸酯的互变异构体当量。酸不稳定的TMS醚的脱保护提供了所需的产物。