苄基2,4-二-O-苯甲酰基-alpha-D-吡喃木糖 | 18403-18-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 苄基2,4-二-O-苯甲酰基-alpha-D-吡喃木糖
• 英文名称: benzyl 2,4-di-O-benzoyl-α-D-xylopyranoside
• 英文别名: Benzyl-2,4-di-O-benzoyl-α-D-xylopyranosid；Benzyl 2,4-DI-O-benzoyl-A-D-xylopyranoside；[(3R,4S,5R,6S)-5-benzoyloxy-4-hydroxy-6-phenylmethoxyoxan-3-yl] benzoate
• CAS: 18403-18-4
• 化学式: C₂₆H₂₄O₇
• 分子量: 448.472
• InChiKey: IAVXGOHFSIPDOM-VUMQFKOGSA-N

物化性质

• 沸点：
  637.4±55.0 °C(Predicted)
• 密度：
  1.32±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  33
• 可旋转键数：
  9
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  91.3
• 氢给体数：
  1
• 氢受体数：
  7

安全信息

• 海关编码：
  2932999099

反应信息

• 作为反应物：
  描述：

  苄基2,4-二-O-苯甲酰基-alpha-D-吡喃木糖 在 palladium on activated charcoal 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 、 氢气 、 sodium methylate 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 甲醇 、 乙醇 、 二氯甲烷 、 乙酸乙酯 为溶剂， -50.0~20.0 ℃ 、101.33 kPa 条件下， 反应 8.25h， 生成 ethyl 2,3-O-isopropylidene-β-D-apiofuranosyl-(1->3)-β-D-xylopyranosyl-(1->4)-2,3-O-isopropylidene-1-thio-α-L-rhamnoside
  参考文献：
  名称：

  强效免疫佐剂 QS-21 的三糖和四糖部分的合成

  摘要：

  标题三糖和四糖部分已合成作为我们研究计划的一部分，以构建复杂的三萜皂苷 QS-21，一种有效的免疫佐剂，已用于一系列临床免疫试验。鉴于葡萄糖醛酸不愿意作为糖基受体，由 D-葡萄糖合成含支链葡萄糖醛酸的三糖 20，其依次在 2 和 3 位糖基化，然后在 6 位氧化，线性序列为15 步，整体产量良好。含 apiose 的四糖 36 是通过线性糖基化策略从非还原性末端糖 D-apiose 构建的，D-apiose 是通过已知的程序从 D-木糖制备的，也是 15 个步骤的线性序列。(C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim,

  DOI：

  10.1002/ejoc.200300580
• 作为产物：
  描述：

  苯甲醇 在 二正丁基氧化锡 、 乙酰氯 作用下， 反应 24.0h， 生成 苄基2,4-二-O-苯甲酰基-alpha-D-吡喃木糖
  参考文献：
  名称：

  Regioselective protection strategies for D-xylopyranosides

  摘要：

  The acylation of D-xylopyranosides can be effected at any position by selective hydroxyl activation with dibutyltin oxide in refluxing benzene and proper choice of starting anomer. Methyl 4-O-benzyl-beta-D-xylopyranoside, available from methyl 2,3-O-isopropylidene-beta-D-xylopyranoside, provides the 2- and 3-benzoates, which are easily separable in 85% combined yield. Methyl and allyl beta-D-xylopyranosides, when treated with 1 equiv of dibutyltin and subsequently with benzoyl chloride (1 equiv), yield their corresponding 4-benzoates (80%). The use of 2 equiv of benzoyl chloride provides the 3,4-dibenzoates in excellent yield (90%). The clean conversion to mono- or dibenzoates, depending on the amount of benzoyl chloride added, suggests that the intermediate stannylene acetals provide different activation levels. A pathway involving acylation of an intermediate dibutylchlorostannyl ether is proposed to explain the observed phenomenon. This sequential selective activation is used to afford protection and differentiation of the 3- and 4-positions with a one-pot synthesis of methyl 4-O-benzoyl-3-O-(chloroacetyl)-beta-D-xylopyranoside. Methyl and benzyl alpha-D-xylopyranosides afford the 2,4-dibenzoates in good yield (> 80%) demonstrating 1,3-activation of a triol system. This protection strategy is used to prepare benzyl O-(2,3,5-tri-O-benzoyl-alpha-L-arabinofuranosyl)-(1 --> 3)-2,4-di-O-benzoyl-alpha-D-xylopyranoside from D-xylose and L-arabinose. In the final step, the silver triflate catalyzed glycosylation of benzyl 2,4-di-O-benzoyl-alpha-D-xylopyranoside by 2,3,5-tri-O-benzoyl-alpha-L-arabinofuranosyl chloride is accomplished in 91% yield.

  DOI：

  10.1021/jo00025a013

文献信息

• Stereoselective Synthesis of 2-<i>S</i>-Phenyl-2-deoxy-β-glycosides Using Phenyl 2,3-<i>O</i>-Thionocarbonyl-1-thioglycoside Donors via 1,2-Migration and Concurrent Glycosidation
  作者：Biao Yu、Zunyi Yang

  DOI：10.1021/ol006894+

  日期：2001.2.1

  [figure: see text] 1,2-Migration and concurrent glycosidation of phenyl 2,3-O-thionocarbonyl-1-thlo-alpha-L-rhamnopyranosides under the action of methyl trifluoromethanesulfonate (MeOTf) afforded in high yields the 3-O-(methylthio)carbonyl-2-S-phenyl-2,6-dideoxy-beta-L-glucopyranosides, ready precursors to the corresponding 2-deoxy-beta-glycosides.

  [图：见正文]在高产量的三氟甲磺酸甲酯（MeOTf）的作用下，1,2,3-O-硫代羰基-1-噻吩-α-L-鼠李糖吡喃糖苷的1,2-迁移和同时糖基化3-O -（甲硫基）羰基-2-S-苯基-2,6-二脱氧-β-L-吡喃葡萄糖苷，相应的2-脱氧-β-糖苷的现成前体。
• Efforts to total synthesis of philinopside E: convergent synthesis of the sulfated lanostane-type tetraglycoside
  作者：Shujin Bai、Zhiyong Wu、Qingyun Huang、Li Zhang、Pengwei Chen、Cong Wang、Xiuli Zhang、Peng Wang、Ming Li

  DOI：10.1039/c5ra25845f

  日期：——

  As an important step to total synthesis of philinopside E with important antitumor activities (Ed50 0.75–3.50 μg mL−1), we described herein convergent synthesis of a triterpene glycoside composed of the sulfated tetrasaccharide residue identical to that of philinopside E and the aglycone of lanost-7-en-3β-ol. The stereocontrolled synthesis of the aglycone from 24,25-dihydrolanosterol was accomplished

  作为具有重要抗肿瘤活性（Ed 50 0.75–3.50μgmL -1）的菲洛甙E的全合成的重要步骤，我们在本文中介绍了由硫酸化四糖残基组成的三萜糖甙的聚合合成，该残基与菲洛甙E和糖苷配基相同lanost-7-en-3β-ol。依靠24,25-二氢羊毛甾醇的立体控制合成糖苷配基是依靠2,3-不饱和-1,4-二酮体系的立体选择性还原，并借助C3-叔丁基二甲基甲硅烷氧基进行的，并且方便地安装了所需的7（ 8）-通过syn的双键消除三氟甲磺酸。通过使糖苷配基与正交保护的木糖基硫糖苷与源自葡萄糖，木糖和喹诺糖衍生物的三糖硫糖苷反应制备的单糖苷顺序收敛会聚，并结合硫酸化和脱保护得到目标分子。我们工作的特点是立体选择性地构建了四个1,2-反式糖苷键，并在后期合成过程中引入了珍贵的糖苷配基，这将促进总酚蓝甙E及其相关天然产物的合成。
• Stereoselective Synthesis of Regioisomers of Aldobiouronic Acid
  作者：Yasuyuki Kawabata、Yasuo Gama、Isao Kusakabe

  DOI：10.1271/bbb.58.1463

  日期：1994.1

  α-Glucuronidase is a very important enzyme for the complete hydrolysis of plant hemicellulose, but the substrate specificity of the enzyme has not previously been reported. In this connection, the three regioisomers of O-(α-d-glucopyranosyluronic acid)-d-xylose (aldobiouronic acid), 2–O-(α-d-glucopy-ranosyluronic acid)-d-xylose (13), 3–O-(α-d-glucopyranosyluronic acid)-d-xylose (14), and 4–O-(α-d-glucopyranosyluronic acid)-d-xylose (15), were stereoselectively synthesized to clarify the substrate specificity.

  α-葡萄糖醛酸酶是植物半纤维素完全水解过程中非常重要的酶，但该酶的底物特异性之前尚未报道。在这方面，立体选择性合成了O-(α-d-葡萄糖吡喃糖苷醛酸)-d-木糖（醛二糖酸）、2–O-(α-d-葡萄糖吡喃糖苷醛酸)-d-木糖 (13)、3–O-(α-d-葡萄糖吡喃糖苷醛酸)-d-木糖 (14) 和4–O-(α-d-葡萄糖吡喃糖苷醛酸)-d-木糖 (15)的三种区域异构体，以澄清其底物特异性。
• C2-Acyloxyglycosylation with Glycal Donors
  作者：Lei Shi、Yong-Jae Kim、David Y. Gin

  DOI：10.1021/ja015991a

  日期：2001.7.1
• Silver(I) oxide-mediated regioselective 2-monoacylation in 3-O-benzyl-α-l-rhamnopyranosides and application in synthesis of a protected tetrasaccharide fragment of potent cytotoxic saponins gleditsiosides C and D
  作者：Qian Yang、Ming Lei、Qin-Jian Yin、Jin-Song Yang

  DOI：10.1016/j.carres.2007.03.001

  日期：2007.7

  The axial 2-hydroxyl group of methyl and allyl 3-O-benzyl-alpha-L-rhamnopyranosides was selectively acylated in 56-78% yields by reaction with 1. 1 equiv of acyl chloride in the presence of 1. 5 equiv of silver(I) oxide. Use of the method permitted a convenient synthesis of a protected tetrasaccharide fragment of triterpene saponins gleditsiosides C and D. (C) 2007 Elsevier Ltd. All rights reserved.