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methyl 2,3,4-tri-O-benzyl-(6R)-C-methyl-α-D-glucopyranoside | 118249-88-0

中文名称
——
中文别名
——
英文名称
methyl 2,3,4-tri-O-benzyl-(6R)-C-methyl-α-D-glucopyranoside
英文别名
methyl 2,3,4-tri-O-benzyl-7-deoxy-α-L-glycero-D-gluco-heptopyranoside;Methyl 7-Deoxy-2,3,4-tris-O-(phenylmethyl)-L-glycero-alpha-D-gluco-heptopyranoside;(1S)-1-[(2R,3S,4S,5R,6S)-6-methoxy-3,4,5-tris(phenylmethoxy)oxan-2-yl]ethanol
methyl 2,3,4-tri-O-benzyl-(6R)-C-methyl-α-D-glucopyranoside化学式
CAS
118249-88-0
化学式
C29H34O6
mdl
——
分子量
478.585
InChiKey
YSKIJCCVGJNOAO-WPANOKLWSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

物化性质

  • 沸点:
    598.3±50.0 °C(Predicted)
  • 密度:
    1.19±0.1 g/cm3(Predicted)

计算性质

  • 辛醇/水分配系数(LogP):
    3.9
  • 重原子数:
    35
  • 可旋转键数:
    11
  • 环数:
    4.0
  • sp3杂化的碳原子比例:
    0.38
  • 拓扑面积:
    66.4
  • 氢给体数:
    1
  • 氢受体数:
    6

上下游信息

  • 上游原料
    中文名称 英文名称 CAS号 化学式 分子量
  • 下游产品
    中文名称 英文名称 CAS号 化学式 分子量

反应信息

  • 作为反应物:
    参考文献:
    名称:
    The syntheses of 6-C-alkyl derivatives of methyl α-isomaltoside for a study of the mechanism of hydrolysis by amyloglucosidase
    摘要:
    为了研究引入不同大小烷基基团对酶类淀粉酶(EC 3.2.1.3,通常称为葡萄糖淀粉酶)对α-糖苷键水解速率的影响,合成了甲基α-异麦芽糖苷(1)的异构体(6aR)-和(6aS)-C-烷基(甲基、乙基和异丙基)衍生物。之前已确定,甲基(6aR)-C-甲基α-异麦芽糖苷的水解速率约比甲基α-异麦芽糖苷快大约2倍,比其S-异构体快大约8倍。最近还发表了乙基和异丙基类似物的水解动力学。正如从分子模型计算所预期的那样,所有的R-异构体都是良好的底物。提出了基于传统机械理论的催化理论,包括通过氢键将4a-羟基与色氨酸和精氨酸单元连接起来,以促进激活复合物向产物的分解。建议初始形成的复合物向过渡态的激活是通过由受扰动的水分子在多胶性底物和结合位点表面的脱水和分子间氢键的建立释放的能量来辅助的,即微热力学。周围环绕结合位点的芳香氨基酸壳层阻碍了热量向大量溶液的传播。这种屏蔽层已知位于凝集素和特异性碳水化合物抗体的结合位点周围,并被认为是必要的,以防止破坏分子间氢键,这对于复合物的稳定性至关重要。这些特征与结合位点内反应分子的精致立体电子排布一起,为在常温和接近中性pH下的催化提供了合理解释。合成涉及将烷基格氏试剂加到甲基6-醛基-α-D-葡萄糖吡喃糖。加成有利于S-异构体的形成,超过90%。通过使用传统方法在手性中心进行异构化,得到了活性R-异构体的有用量。在溴离子催化条件下对所得醇进行糖基化,提供了甲基(6aS)-和(6aR)-C-烷基-七O-苄基-α-异麦芽糖苷。对苄基团的催化氢解得到了期望的二糖。通过1H核磁共振研究,确定了绝对构型并提供了构象偏好的证据。关键词:淀粉酶(AMG),外部异构效应,6-C-烷基-α-D-葡萄糖吡喃糖和异麦芽糖苷,酶催化机制。
    DOI:
    10.1139/v01-005
  • 作为产物:
    参考文献:
    名称:
    The syntheses of 6-C-alkyl derivatives of methyl α-isomaltoside for a study of the mechanism of hydrolysis by amyloglucosidase
    摘要:
    为了研究引入不同大小烷基基团对酶类淀粉酶(EC 3.2.1.3,通常称为葡萄糖淀粉酶)对α-糖苷键水解速率的影响,合成了甲基α-异麦芽糖苷(1)的异构体(6aR)-和(6aS)-C-烷基(甲基、乙基和异丙基)衍生物。之前已确定,甲基(6aR)-C-甲基α-异麦芽糖苷的水解速率约比甲基α-异麦芽糖苷快大约2倍,比其S-异构体快大约8倍。最近还发表了乙基和异丙基类似物的水解动力学。正如从分子模型计算所预期的那样,所有的R-异构体都是良好的底物。提出了基于传统机械理论的催化理论,包括通过氢键将4a-羟基与色氨酸和精氨酸单元连接起来,以促进激活复合物向产物的分解。建议初始形成的复合物向过渡态的激活是通过由受扰动的水分子在多胶性底物和结合位点表面的脱水和分子间氢键的建立释放的能量来辅助的,即微热力学。周围环绕结合位点的芳香氨基酸壳层阻碍了热量向大量溶液的传播。这种屏蔽层已知位于凝集素和特异性碳水化合物抗体的结合位点周围,并被认为是必要的,以防止破坏分子间氢键,这对于复合物的稳定性至关重要。这些特征与结合位点内反应分子的精致立体电子排布一起,为在常温和接近中性pH下的催化提供了合理解释。合成涉及将烷基格氏试剂加到甲基6-醛基-α-D-葡萄糖吡喃糖。加成有利于S-异构体的形成,超过90%。通过使用传统方法在手性中心进行异构化,得到了活性R-异构体的有用量。在溴离子催化条件下对所得醇进行糖基化,提供了甲基(6aS)-和(6aR)-C-烷基-七O-苄基-α-异麦芽糖苷。对苄基团的催化氢解得到了期望的二糖。通过1H核磁共振研究,确定了绝对构型并提供了构象偏好的证据。关键词:淀粉酶(AMG),外部异构效应,6-C-烷基-α-D-葡萄糖吡喃糖和异麦芽糖苷,酶催化机制。
    DOI:
    10.1139/v01-005
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文献信息

  • Synthesis of Gentamicin Minor Components: Gentamicin B1 and Gentamicin X2
    作者:Parasuraman Rajasekaran、David Crich
    DOI:10.1021/acs.orglett.0c01107
    日期:2020.5.15
    studies, the synthesis of a fully and selectively protected garamine-based acceptor has been developed from readily available sisomicin. Glycosylation of this acceptor with a 6-azido-6,7-dideoxy-d-glycero-d-glucoheptopyranosyl donor affords gentamicin B1 after deprotection, whereas employment of a 2-azido-2-deoxy-d-glucopyranosyl donor under N,N-dimethylformamide-directed glycosylation conditions affords
    临床氨基糖苷类抗生素庆大霉素是几种难以分离的主要成分和次要成分的混合物。微量成分的相对不可及性尤其使将抗菌活性与肾毒性和/或耳毒性分开并澄清可能具有治疗意义的通读活性的起源的努力变得复杂。为了促进此类研究,已经从容易获得的西索霉素开发了完全和选择性保护的基于加拉明的受体的合成。该受体与6-叠氮基-6,7-二脱氧-d-甘油-d-葡萄糖庚基吡喃糖基供体的糖基化在脱保护后提供庆大霉素B1,而在N,N下使用2-叠氮基-2-脱氧-d-吡喃葡萄糖基供体-二甲基甲酰胺指导的糖基化条件在脱保护后得到庆大霉素X2。
  • Recognition of oligosaccharide substrates by N-acetylglucosaminyltransferase-V
    作者:Om P. Srivastava、Ole Hindsgaul、Mohamed Shoreibah、Michael Pierce
    DOI:10.1016/0008-6215(88)84115-6
    日期:1988.8
    the trisaccharide 8-methoxycarbonyloctyl 6-O-[2-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)-alpha-D-mannopyrano syl] -beta-D-mannopyranoside (3), a previously reported acceptor for N-acetylglucosaminyltransferase-V (GnT-V) have been chemically synthesized and evaluated as GnT-V acceptors. Replacement of the beta-D-man rho-O(CH2)8COOMe "reducing end" of 3 by beta-D-Glc rho-O(CH2)7 CH3 gave octyl
    三糖8-甲氧基羰基辛基6-O- [2-O-(2-乙酰氨基-2-脱氧-β-D-吡喃吡喃糖基)-α-D-甘露吡喃糖基]-β-D-甘露吡喃糖苷的六个类似物(3),化学合成了先前报道的N-乙酰氨基葡萄糖氨基转移酶-V(GnT-V)的受体,并将其评估为GnT-V受体。用β-D-Glcrho-O(CH2)7 CH3取代3的β-D-manrho-O(CH2)8COOMe“还原端”得到辛基6-O- [2-O-(2-乙酰氨基) -2-脱氧-β-D-吡喃葡糖基]-α-D-甘露吡喃糖基)-β-D-吡喃葡糖苷(5)的活性与3的活性没有区别。除去β-D-Glc的4-OH基团5中的残基对活性几乎没有影响,而相应的4-O-甲基衍生物的活性是其两倍。用甲基取代相同残基的C-6 pro-R氢,得到L-甘油-D-葡萄糖衍生物8,而替换相应的pro-S氢则得到D-甘油-D-葡萄糖化合物9。三糖8,其围绕C-5-C-6键的旋转异
  • The syntheses of 6-<i>C</i>-alkyl derivatives of methyl α-isomaltoside for a study of the mechanism of hydrolysis by amyloglucosidase
    作者:Ulrike Spohr、Nghia Le、Chang-Chun Ling、Raymond U Lemieux
    DOI:10.1139/v01-005
    日期:2001.2.1

    The epimeric (6aR)- and (6aS)-C-alkyl (methyl, ethyl and isopropyl) derivatives of methyl α-isomaltoside (1) were synthesized in order to examine the effects of introducing alkyl groups of increasing bulk on the rate of catalysis for the hydrolysis of the interunit α-glycosidic bond by the enzyme amyloglucosidase, EC 3.2.1.3, commonly termed glucoamylase (AMG). It was previously established that methyl (6aR)-C-methyl α-isomaltoside is hydrolysed about 2 times faster than methyl α-isomaltoside and about 8 times faster than its S-isomer. The kinetics for the hydrolyses of the ethyl and isopropyl analogs were also recently published. As was expected from molecular model calculations, all the R-epimers are good substrates. A rationale is presented for the catalysis based on conventional mechanistic theories that includes the assistance for the decomposition of the activated complex to products by the presence of a hydrogen bond, which connects the 4a-hydroxyl group to the tryptophane and arginine units. It is proposed that activation of the initially formed complex to the transition state is assisted by the energy released as a result of both of the displacement of perturbed water molecules of hydration at the surfaces of both the polyamphiphilic substrate and the combining site and the establishment of intermolecular hydrogen bonds, i.e., micro-thermodynamics. The dissipation of the heat to the bulk solution is impeded by a shell of aromatic amino acids that surround the combining site. Such shields are known to be located around the combining sites of lectins and carbohydrate specific antibodies and are considered necessary to prevent the disruption of the intermolecular hydrogen bonds, which are of key importance for the stability of the complex. These features together with the exquisite stereoelectronic dispositions of the reacting molecules within the combining site offer a rationalization for the catalysis at ambient temperatures and near neutral pH. The syntheses involved the addition of alkyl Grignard reagents to methyl 6-aldehydo-α-D-glucopyranoside. The addition favoured formation of the S-epimers by over 90%. Useful amounts of the active R-isomers were obtained by epimerization of the chiral centers using conventional methods. Glycosylation of the resulting alcohols under conditions for bromide-ion catalysis, provided methyl (6aS)- and (6aR)-C-alkyl-hepta-O-benzyl-α-isomaltosides. Catalytic hydrogenolysis of the benzyl groups afforded the desired disaccharides. 1H NMR studies established the absolute configurations and provided evidence for conformational preferences.Key words: amyloglucosidase (AMG), exo-anomeric effect, 6-C-alkyl-α-D-glucopyranosides and isomaltosides, mechanism of enzyme catalysis.

    为了研究引入不同大小烷基基团对酶类淀粉酶(EC 3.2.1.3,通常称为葡萄糖淀粉酶)对α-糖苷键水解速率的影响,合成了甲基α-异麦芽糖苷(1)的异构体(6aR)-和(6aS)-C-烷基(甲基、乙基和异丙基)衍生物。之前已确定,甲基(6aR)-C-甲基α-异麦芽糖苷的水解速率约比甲基α-异麦芽糖苷快大约2倍,比其S-异构体快大约8倍。最近还发表了乙基和异丙基类似物的水解动力学。正如从分子模型计算所预期的那样,所有的R-异构体都是良好的底物。提出了基于传统机械理论的催化理论,包括通过氢键将4a-羟基与色氨酸和精氨酸单元连接起来,以促进激活复合物向产物的分解。建议初始形成的复合物向过渡态的激活是通过由受扰动的水分子在多胶性底物和结合位点表面的脱水和分子间氢键的建立释放的能量来辅助的,即微热力学。周围环绕结合位点的芳香氨基酸壳层阻碍了热量向大量溶液的传播。这种屏蔽层已知位于凝集素和特异性碳水化合物抗体的结合位点周围,并被认为是必要的,以防止破坏分子间氢键,这对于复合物的稳定性至关重要。这些特征与结合位点内反应分子的精致立体电子排布一起,为在常温和接近中性pH下的催化提供了合理解释。合成涉及将烷基格氏试剂加到甲基6-醛基-α-D-葡萄糖吡喃糖。加成有利于S-异构体的形成,超过90%。通过使用传统方法在手性中心进行异构化,得到了活性R-异构体的有用量。在溴离子催化条件下对所得醇进行糖基化,提供了甲基(6aS)-和(6aR)-C-烷基-七O-苄基-α-异麦芽糖苷。对苄基团的催化氢解得到了期望的二糖。通过1H核磁共振研究,确定了绝对构型并提供了构象偏好的证据。关键词:淀粉酶(AMG),外部异构效应,6-C-烷基-α-D-葡萄糖吡喃糖和异麦芽糖苷,酶催化机制。
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