tert-butyldiphenylsilyl 2-phthalimido-3,6-di-O-benzyl-2-deoxy-β-D-dlucopyranoside

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: tert-butyldiphenylsilyl 2-phthalimido-3,6-di-O-benzyl-2-deoxy-β-D-dlucopyranoside
• 英文别名: t-butyldiphenylsilyl 3,6-di-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside；2-[(2S,3R,4R,5S,6R)-2-[tert-butyl(diphenyl)silyl]oxy-5-hydroxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-3-yl]isoindole-1,3-dione
• 化学式: C₄₄H₄₅NO₇Si
• 分子量: 727.929
• InChiKey: AQXTXIBJNHSCRW-GDNVKHTBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.12
• 重原子数：
  53
• 可旋转键数：
  13
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.27
• 拓扑面积：
  94.5
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  tert-butyldiphenylsilyl 2-phthalimido-3,6-di-O-benzyl-2-deoxy-β-D-dlucopyranoside 在 2,6-二叔丁基-4-甲基吡啶 、 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 、 sodium methylate 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 反应 4.83h， 生成 2-[(2S,3R,4R,5S,6R)-4-Benzyloxy-6-benzyloxymethyl-2-(tert-butyl-diphenyl-silanyloxy)-5-((2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-3-yl]-isoindole-1,3-dione
  参考文献：
  名称：

  Synthesis of Core-class 2O-Linked Glycopeptides: a Benzyl-protected Tetrasaccharyl Serine and its Derivative Carrying a Hydrophobic Cholestanyl Group

  摘要：

  一种核心类2的四糖链接丝氨酸以汇聚方式合成。双糖糖基给体3与受体4的偶联反应立体选择性地合成了四糖15，随后将其转化为糖基氟化物20。用20对Fmoc丝氨酸烯丙酯5进行糖基化反应分别以40%和33%的产率得到了α-和β-糖苷。α异构体21被转化为1，这是固相合成糖肽的有用构建模块。另一方面，21进行了N-脱保护，并通过琥珀酰间隔基与疏水的胆固醇醇缩合。同样，该化合物也可通过20与28的偶联反应来合成。功能基团的操控和氢化得到了核心2四糖-胆固醇醇结合物2。

  DOI：

  10.1271/bbb.66.1904

文献信息

• Synthesis of Core-class 2<i>O</i>-Linked Glycopeptides: a Benzyl-protected Tetrasaccharyl Serine and its Derivative Carrying a Hydrophobic Cholestanyl Group
  作者：Jun WATABE、Latika SINGH、Yuko NAKAHARA、Yukishige ITO、Hironobu HOJO、Yoshiaki NAKAHARA

  DOI：10.1271/bbb.66.1904

  日期：2002.1

  A core-class 2 tetrasaccharide-linked serine was synthesized in a convergent manner. The coupling reaction of disaccharide glycosyl donor 3 and acceptor 4 stereoselectively afforded tetrasaccharide 15, which was converted to glycosyl fluoride 20. Glycosylation of Fmoc serine allyl ester 5 with 20 produced α- and β-glycosides in 40% and 33% yields, respectively. α-Isomer 21 was converted into 1, a useful building block for the solid-phase synthesis of glycopeptides. On the other hand, 21 was N-deprotected and condensed with hydrophobic cholestanol through a succinyl spacer. The same compound was alternatively synthesized by coupling 20 and 28. Functional group manipulation and hydrogenation afforded core 2 tetrasaccharide-cholestanol conjugate 2.

  一种核心类2的四糖链接丝氨酸以汇聚方式合成。双糖糖基给体3与受体4的偶联反应立体选择性地合成了四糖15，随后将其转化为糖基氟化物20。用20对Fmoc丝氨酸烯丙酯5进行糖基化反应分别以40%和33%的产率得到了α-和β-糖苷。α异构体21被转化为1，这是固相合成糖肽的有用构建模块。另一方面，21进行了N-脱保护，并通过琥珀酰间隔基与疏水的胆固醇醇缩合。同样，该化合物也可通过20与28的偶联反应来合成。功能基团的操控和氢化得到了核心2四糖-胆固醇醇结合物2。
• Preparation of core 2 type tetrasaccharide carrying decapeptide by benzyl protection-based solid-phase synthesis strategy
  作者：Yutaka Takano、Motoki Habiro、Masaomi Someya、Hironobu Hojo、Yoshiaki Nakahara

  DOI：10.1016/s0040-4039(02)01947-0

  日期：2002.11

  alNAc-(1→3)-l-Ser/Thr building blocks for solid-phase synthesis of glycopeptide were stereoselectively synthesized in a benzyl-protected form. The key glycosylation reaction to form β-d-GlcNAc linkage was established by the use of protected N-trichloroacetyl-d-lactosaminyl fluoride. Usefulness of the building block was demonstrated by solid-phase synthesis of a segment of human leukosialin. Benzyl

  β-d-Gal-（1→4）-β-d-GlcNAc-[β-d-Gal-（1→3）]-α-d-GalNAc-（1→3）-l-Ser / Thr构建以苄基保护的形式立体选择性地合成糖肽的固相合成嵌段。形成β-d-GlcNAc键的关键糖基化反应是通过使用受保护的N-三氯乙酰基-d-乳糖胺基氟化物建立的。该构建基的有用性通过人类白细胞唾液酸蛋白片段的固相合成证明。通过“低酸度TfOH”条件可有效去除苄基保护基。
• Synthesis of an Unnatural<i>N</i>-Glycan-linked Dolichyl Pyrophosphate Precursor
  作者：Yuko NAKAHARA、Tomoharu NONAKA、Hironobu HOJO、Yoshiaki NAKAHARA

  DOI：10.1271/bbb.67.1761

  日期：2003.1

  An unnatural α-D-mannopyranose-linked chitobiosyl dolichyl pyrophosphate, a stereoisomer of the N-glycan biosynthesis intermediate, was synthesized. The protected trisaccharide, α-D-Man-(1→4)-β-D-GlcNAc-(1→4)-D-GlcNAc, carrying a 4-methylbenzoyl group was prepared for the convenience of a TLC analysis. 1-O-Phosphorylation, condensation with dolichyl phosphate, and subsequent deprotection afforded the title compound.

  合成了一种非天然的 α-D-吡喃甘露糖连接的壳二糖多醇焦磷酸，它是 N-聚糖生物合成中间体的立体异构体。为了方便TLC分析，制备了带有4-甲基苯甲酰基的保护三糖α-D-Man-(1→4)-β-D-GlcNAc-(1→4)-D-GlcNAc。 1-O-磷酸化，与磷酸多乙醇酯缩合，随后脱保护，得到标题化合物。
• Solid-phase synthesis of core 2 O-linked glycopeptide and its enzymatic sialylation
  作者：Yutaka Takano、Naoya Kojima、Yuko Nakahara、Hironobu Hojo、Yoshiaki Nakahara

  DOI：10.1016/j.tet.2003.08.047

  日期：2003.10

  tetrasaccharide building blocks (1a/1b) for solid-phase synthesis of glycopeptide were synthesized via stereoselective glycosylation of the disaccharyl Ser/Thr (3a/3b) with a glycosyl fluoride (2) carrying the 2-trichloroacetamido group that was readily converted into a 2-acetamido group by reduction. A segment of glycoprotein leukosialin (215–224) was synthesized by the solid-phase protocol, the building block (1b)

  固相合成糖肽的核心2型四糖结构单元（1a / 1b）是通过二糖基Ser / Thr（3a / 3b）与带有2-三氯乙酰胺基的糖基氟化物（2）的立体选择性糖基化合成的。通过还原容易地将其转化为2-乙酰氨基基团。固相规程合成了糖蛋白白蜡蛋白（215-224）的一个片段，即构件（1b）被利用。用试剂K从树脂上切割合成糖肽，然后用“低酸度TfOH”混合物对产物进行处理，促进了苄基的完全除去，糖苷键的损失最小。通过使用特定的唾液酸转移酶，以非常高的效率将N-乙酰神经氨酸（唾液酸）残基酶促地引入到去保护的糖肽（21）中。