摩熵化学
数据库官网
小程序
打开微信扫一扫
首页 分子通 化学资讯 化学百科 反应查询 关于我们
请输入关键词

2,2-dichloro-4,4,6,6-tetramethyl-1,3,5,2,4,6-trioxatrisilinane | 51842-31-0

中文名称
——
中文别名
——
英文名称
2,2-dichloro-4,4,6,6-tetramethyl-1,3,5,2,4,6-trioxatrisilinane
英文别名
methyl 4,6-di-O-acetyl-α-D-glucopyranoside;Methyl-D-glucopyranosid-4,6-diacetat;Methyl-4,6-di-O-acetyl-α-D-glucopyranosid
2,2-dichloro-4,4,6,6-tetramethyl-1,3,5,2,4,6-trioxatrisilinane化学式
CAS
51842-31-0
化学式
C11H18O8
mdl
——
分子量
278.259
InChiKey
QFVKRCNWCDNNRR-ILAIQSSSSA-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:
    388.5±42.0 °C(Predicted)
  • 密度:
    1.33±0.1 g/cm3(Predicted)

计算性质

  • 辛醇/水分配系数(LogP):
    -1.43
  • 重原子数:
    19.0
  • 可旋转键数:
    4.0
  • 环数:
    1.0
  • sp3杂化的碳原子比例:
    0.82
  • 拓扑面积:
    111.52
  • 氢给体数:
    2.0
  • 氢受体数:
    8.0

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:
    Preparation and n.m.r.-spectral characteristics of benzyl-α,α-d2 ethers of monosaccharides
    摘要:
    DOI:
    10.1016/s0008-6215(00)90747-x
  • 作为产物:
    描述:
    2,3,4,6-四-o-乙酰基-alpha-d-吡喃葡萄糖苷甲酯一水合肼 作用下, 以 乙腈 为溶剂, 反应 48.0h, 以4%的产率得到2,2-dichloro-4,4,6,6-tetramethyl-1,3,5,2,4,6-trioxatrisilinane
    参考文献:
    名称:
    Regioselective Deacetylation of Fully Acetylated Mono- and Di-Saccharides With Hydrazine Hydrate
    摘要:
    过乙酰化还原二糖 (1)、(5)、(9)、(15)、β-D-吡喃葡萄糖 (17) 和 2-乙酰氨基-2-脱氧-β-D-吡喃葡萄糖 (19) 与 1.2 等当量的肼水合物在乙腈中进行选择性脱乙酰化反应,主要得到相应的七乙酸酯 (2)、(6)、(10)、(16)、四乙酸酯 (18)乙腈中的水合肼反应,主要得到相应的七乙酸酯(2)、(6)、(10)、(16)、 四乙酸酯(18)和三乙酸酯(20),其游离羟基位于 C1。将(1)与 1.2 等量的水合肼在 N,N-二甲基甲酰胺中反应,也能得到庚乙酸酯(2),但产量较低。当用 2.5 等量的水合肼对(1)、(5)和(9)进行反应时,在其他位置也会发生脱乙酰化反应,从而得到相应的六乙酸酯(3)、(7)、(11)和(12)(羟基位于 C 1,2 或 C 1,3)以及五乙酸酯(4)、(8)和(13)(羟基位于 C 1,2,3)。此外,麦芽糖八乙酸酯(9)可生成四乙酸酯(14),其中的游离羟基位于 C1,2,2',3。化合物 (15) 在与 2.5 等量的水合肼处理后,生成了一种难溶于水的混合物。2,3,4,6-O-四乙酰基-α-D-吡喃葡萄糖苷甲酯 (21) 与 2.5 等量的水合肼反应,得到 3,4,6-三乙酸酯 (22)、分别为 2,6- 和 3,6- 二乙酸酯 (23) 和 (24) 的混合物、4,6-二乙酸酯 (25) 和 6- 乙酸酯 (26)。
    DOI:
    10.1071/ch9960293
点击查看最新优质反应信息

文献信息

  • Novel methods for the preparation of partially acetylated carbohydrates
    作者:Stephen Hanessian、Masahiro Kagotani
    DOI:10.1016/0008-6215(90)84071-2
    日期:1990.7
    Abstract The selective acetylation of methyl a - d -hexopyranosides in the presence of zinc chloride shows unusual reactivity patterns compared to control experiments. Hydroperoxide ion is a mild and selective deacetylation reagent which does not attack primary acetates.
    摘要在氯化锌存在下,甲基α-d-己喃糖苷的选择性乙酰化与对照实验相比,显示出不同寻常的反应模式。氢过氧化物离子是一种温和的,选择性的脱乙酰基试剂,不会侵蚀初级乙酸盐
  • Diboron-Catalyzed Regio- and 1,2-<i>cis</i>-α-Stereoselective Glycosylation of <i>trans</i>-1,2-Diols
    作者:Shunpei Tomita、Masamichi Tanaka、Michitaka Inoue、Kazuki Inaba、Daisuke Takahashi、Kazunobu Toshima
    DOI:10.1021/acs.joc.0c02093
    日期:2020.12.18
    2-cis-α-stereoselective glycosylations were investigated using 1,2-anhydroglucose donors and trans-1,2-diol sugar acceptors in the presence of a diboron catalyst. The reactions proceeded smoothly to provide the corresponding 1,2-cis-α-glycosides with consistently very high stereoselectivity and were regioselectivity controlled by the protecting groups of the acceptor. The present glycosylation method was applied
    在二催化剂存在下,使用1,2-脱葡萄糖供体和反式-1,2-二醇糖受体研究了区域-和1,2-顺-α-立体选择性糖基化。反应进行顺利,以提供相应的1,2-顺式-α-糖苷,其始终具有非常高的立体选择性,并由受体的保护基团控制了区域选择性。目前的糖基化方法已成功应用于α-1,3-葡聚糖五糖的高效合成。
  • Directing-protecting groups for carbohydrates. Design, conformational study, synthesis and application to regioselective functionalization
    作者:Nicolas Moitessier、Pablo Englebienne、Yves Chapleur
    DOI:10.1016/j.tet.2005.04.060
    日期:2005.7
    A novel concept of regioselective transformation of secondary hydroxyl groups in carbohydrates is presented. First, the relative reactivity of the free hydroxyl groups of onoprotected D-glucose derivatives was assessed using acetylation as a model reaction. As a result, acylation of these polyols gave it mixture of monosubstituted products in which the 3-O functionalized derivatives predominated. Novel hydrogen bond acceptor protecting groups were next designed to modulate the 4-OH and 3-OH reactivity in the hope to mediate higher regioselective transformations. A molecular modeling study later validated by spectroscopic analysis predicted additional intramolecular hydrogen bonds between the hydroxyl groups and pyridyl-containing protecting groups. Taking advantage of this induced hydrogen bond network. we achieved regioselective acetylation of the hydroxyl group at position 3 without protecting any secondary hydroxyl groups of the carbohydrate moiety. This designed protecting/directing group increased the nucleophilicity and the steric hindrance of position 3. As a result, optimization of the reaction conditions enabled the monoacetylation (not affected by steric hindrance) of 6-O-protected,glucopyranosides at position 3 and selective silylation (affected by steric hindrance) of position 2 in high isolated yields and regioselectivities. This result certainly opens doors to the regioselective open glycosylation of carbohydrates. (c) 2005 Elsevier Ltd. All rights reserved.
查看更多