ethyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-glucopyranoside | 146530-63-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-glucopyranoside
• 英文别名: [(4aR,6S,7R,8S,8aR)-6-ethylsulfanyl-2-phenyl-8-phenylmethoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl] benzoate
• CAS: 146530-63-4
• 化学式: C₂₉H₃₀O₆S
• 分子量: 506.62
• InChiKey: VHVOTFOCOOIQTR-RVXHUSFESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.3
• 重原子数：
  36
• 可旋转键数：
  9
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.34
• 拓扑面积：
  88.5
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  ethyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-glucopyranoside 在 2,2,6,6-tetramethyl-piperidine-N-oxyl 、 sodium hypochlorite 、 2,6-二叔丁基-4-甲基吡啶 、 4 Angstroem MS 、 Dowex H⁺ 、 四丁基溴化铵 、 碳酸氢钠 、 DMTST 、 三氟乙酸 、 sodium bromide 作用下， 以 吡啶 、 二氯甲烷 、 水 为溶剂， 反应 2.92h， 生成 (2S,3S,4S,5R,6R)-3-Acetoxy-5-benzoyloxy-4-benzyloxy-6-((1R,2R,3S,4R,5R)-3,4-bis-benzoyloxy-6,8-dioxa-bicyclo[3.2.1]oct-2-yloxy)-tetrahydro-pyran-2-carboxylic acid methyl ester
  参考文献：
  名称：

  肺炎链球菌3型荚膜多糖重复单元的合成作为适合形成低聚物的结构单元。

  摘要：

  描述了由可选择性去除的3'- O-苄基保护的纤维二糖硫糖苷供体12的合成。供体12适合作为构建对应于3型肺炎链球菌荚膜多糖的低聚物结构中的单体结构单元。通过对4'，6'-二醇纤维二糖衍生物的区域选择性TEMPO-氧化来引入羧基官能团。如果在2,3,2'，3'，4'，6'-己醇衍生物上进行氧化，则还观察到仲2-羟基和3-羟基的氧化，得到三羧基衍生物作为主要化合物之一产品。硫代糖苷是通过1，6-脱水桥的酸性巯基分解形成的。捐助者12 通过与间隔醇进行糖基化和随后的脱苄基反应，将其转化为合适的起始单体受体。

  DOI：

  10.1080/07328309808002339
• 作为产物：
  描述：

  ethyl 2,4,6-tri-O-acetyl-3-O-benzyl-1-thio-β-D-glucopyranoside 在 吡啶 、 sodium methylate 、 zinc(II) chloride 作用下， 以 甲醇 为溶剂， 反应 4.0h， 生成 ethyl 2-O-benzoyl-3-O-benzyl-4,6-O-benzylidene-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  Synthetic studies toward pyruvate acetal containing saccharides. Synthesis of the carbohydrate part of the Mycobacterium smegmatis pentasaccharide glycolipid and fragments thereof for the preparation of neoantigens

  摘要：

  A series of 2,3-di-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-D-glucopyranosyl donors (beta-phenylthio 3, bromide 4, alpha-chloride 5, beta-fluoride 6, and trichloroacetimidate 7) were prepared from the corresponding alpha-allyl glucoside 1 via the deallylated glucose 2 and were tested in glycosylation reactions with methanol to give the pyruvylated methyl glucosides 8 and 9 and with methyl 2,4,6-tri-O-benzoyl-beta-D-glucopyranoside 10 to give the disaccharide 11. Best results with respect to yield and beta-selectivity of the coupling were achieved with imidate 7. Thus, the 2-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-3-O-methyl-D-glucopyranosyl trichloroacetimidate 14 was prepared from its benzyl glucoside 12 and used for the synthesis of fragments related to the Mycobacterium smegmatis lipopentasaccharide. Trimethylsilyl trifluoromethanesulfonate-mediated condensation of 14, 5-[(benzyloxycarbonyl)amino]pentanol, and 10, respectively, followed by deblocking of the products 15 and 17 gave the pyruvylated aminopentyl glucoside 16 and methyl laminaribioside 18. Treatment of 17 with dichloromethyl methyl ether gave the laminaribiosyl chloride 19, coupling of which with protected 5-aminopentanol gave 20 also obtained from 14 and the monosaccharide nucleophile 26. The trisaccharide 5-aminopentyl glycoside fragment 42 was prepared by first coupling of 14 and benzyl 2-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-alpha-D-glucopyranoside 30 that was converted to the bispyruvylated laminaribiose imidate 33, followed by condensation with thioglycoside 38 obtainable in four steps from 1,2,4,6-tetra-O-acetyl-3-O-benzyl-beta-D-glucopyranose to give the trisaccharide ethyl thioglycoside 40. Next, NIS-mediated condensation of 40 and 5-[(benzyloxycarbonyl)amino]pentanol followed by deblocking gave 42. Pentasaccharide 45 was similarly prepared from 40 and hepta-O-benzoyltrehalose 43 to give first the blocked saccharide 44, deblocking of which afforded the target pentasaccharide.

  DOI：

  10.1021/jo00057a021

文献信息

• Synthesis of a pentasaccharide corresponding to the repeating unit of the exopolysaccharide from cryptococcus neoformans serovar D
  作者：Korien Zegelaar-Jaarsveld、Sander A.W. Smits、Gijs A. van der Marel、Jacques H. van Boom

  DOI：10.1016/s0968-0896(96)00164-2

  日期：1996.11

  The assembly of the pentasaccharide repeating unit of the exopolysaccharide from Cryptococcus neoformans serovar D (i.e. 1) is described. The glucuronic acid residue in 1 is introduced as a glucopyranoside and oxidized in a later stage of the synthesis. Thus, iodonium ion-assisted glycosylation of the partially protected methyl mannopyranoside 11 with ethylthio donor 14 gave, after selective deprotection

  描述了来自新隐球菌血清D（即1）的胞外多糖的五糖重复单元的组装。1中的葡萄糖醛酸残基以吡喃葡萄糖苷的形式引入，并在合成的后期阶段被氧化。因此，在选择性去保护后，部分保护的甲基甘露吡喃糖苷11与乙硫基供体14的碘鎓离子辅助糖基化得到二糖18。后者与D-吡喃葡萄糖苷35的延伸得到三糖36。随后的保护基操作产生受体37。缩合。用三糖受体37制备二糖供体31得到五糖38。38的保护基操作得到42，其葡糖苷被氧化得到相应的葡糖醛酸苷44。44的加氢水解得到目标五糖1。
• Synthetic studies toward pyruvate acetal containing saccharides. Synthesis of the carbohydrate part of the Mycobacterium smegmatis pentasaccharide glycolipid and fragments thereof for the preparation of neoantigens
  作者：Thomas Ziegler、Elisabeth Eckhardt、Veronique Birault

  DOI：10.1021/jo00057a021

  日期：1993.2

  A series of 2,3-di-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-D-glucopyranosyl donors (beta-phenylthio 3, bromide 4, alpha-chloride 5, beta-fluoride 6, and trichloroacetimidate 7) were prepared from the corresponding alpha-allyl glucoside 1 via the deallylated glucose 2 and were tested in glycosylation reactions with methanol to give the pyruvylated methyl glucosides 8 and 9 and with methyl 2,4,6-tri-O-benzoyl-beta-D-glucopyranoside 10 to give the disaccharide 11. Best results with respect to yield and beta-selectivity of the coupling were achieved with imidate 7. Thus, the 2-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-3-O-methyl-D-glucopyranosyl trichloroacetimidate 14 was prepared from its benzyl glucoside 12 and used for the synthesis of fragments related to the Mycobacterium smegmatis lipopentasaccharide. Trimethylsilyl trifluoromethanesulfonate-mediated condensation of 14, 5-[(benzyloxycarbonyl)amino]pentanol, and 10, respectively, followed by deblocking of the products 15 and 17 gave the pyruvylated aminopentyl glucoside 16 and methyl laminaribioside 18. Treatment of 17 with dichloromethyl methyl ether gave the laminaribiosyl chloride 19, coupling of which with protected 5-aminopentanol gave 20 also obtained from 14 and the monosaccharide nucleophile 26. The trisaccharide 5-aminopentyl glycoside fragment 42 was prepared by first coupling of 14 and benzyl 2-O-benzoyl-4,6-O-[(S)-1-(methoxycarbonyl)ethylidene]-alpha-D-glucopyranoside 30 that was converted to the bispyruvylated laminaribiose imidate 33, followed by condensation with thioglycoside 38 obtainable in four steps from 1,2,4,6-tetra-O-acetyl-3-O-benzyl-beta-D-glucopyranose to give the trisaccharide ethyl thioglycoside 40. Next, NIS-mediated condensation of 40 and 5-[(benzyloxycarbonyl)amino]pentanol followed by deblocking gave 42. Pentasaccharide 45 was similarly prepared from 40 and hepta-O-benzoyltrehalose 43 to give first the blocked saccharide 44, deblocking of which afforded the target pentasaccharide.
• Synthesis of the Repeating Unit of the Capsular Polysaccharide of Streptococcus Pneumoniae Type 3 as a Building Block Suitable for Formation of Oligomers
  作者：Per. Garegg、Stefan Oscarson、Ulf Tedebark

  DOI：10.1080/07328309808002339

  日期：1998.5.1

  The synthesis of a cellobiouronic thioglycoside donor 12, protected with a selectively removable 3′-O-benzyl group is described. The donor 12 is suitable as a monomer building block in the construction of oligomer structures corresponding to the capsular polysaccharide of Streptococcus pneumoniae type 3. The carboxyl function was introduced through regioselective TEMPO-oxidation of a 4′,6′-diol cellobiose

  描述了由可选择性去除的3'- O-苄基保护的纤维二糖硫糖苷供体12的合成。供体12适合作为构建对应于3型肺炎链球菌荚膜多糖的低聚物结构中的单体结构单元。通过对4'，6'-二醇纤维二糖衍生物的区域选择性TEMPO-氧化来引入羧基官能团。如果在2,3,2'，3'，4'，6'-己醇衍生物上进行氧化，则还观察到仲2-羟基和3-羟基的氧化，得到三羧基衍生物作为主要化合物之一产品。硫代糖苷是通过1，6-脱水桥的酸性巯基分解形成的。捐助者12 通过与间隔醇进行糖基化和随后的脱苄基反应，将其转化为合适的起始单体受体。