2,2-Dimethyl-propionic acid (3R,4R,5S,6R)-2,5-diacetoxy-3-acetylamino-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester | 120489-41-0

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 2,2-Dimethyl-propionic acid (3R,4R,5S,6R)-2,5-diacetoxy-3-acetylamino-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester
• 英文别名: [(2R,3S,4R,5R)-5-acetamido-3,6-diacetyloxy-4-(2,2-dimethylpropanoyloxy)oxan-2-yl]methyl 2,2-dimethylpropanoate
• CAS: 120489-41-0
• 化学式: C₂₂H₃₅NO₁₀
• 分子量: 473.521
• InChiKey: FOYXHIAVADAVMJ-XNIMBYMISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  33
• 可旋转键数：
  12
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.77
• 拓扑面积：
  144
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为产物：
  描述：

  2-acetamido-2-deoxy-3,6-di-O-pivaloyl-D-glucopyranose 生成 2,2-Dimethyl-propionic acid (3R,4R,5S,6R)-2,5-diacetoxy-3-acetylamino-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-4-yl ester
  参考文献：
  名称：

  LJEVAKOVIC, DURDICA;TOMIC, SRDANKA;TOMASIC, JELKA, CARBOHYDR. RES., 182,(1988) N 2, C. 197-205

  摘要：

  DOI：

文献信息

• Why Is Direct Glycosylation with <i>N</i>-Acetylglucosamine Donors Such a Poor Reaction and What Can Be Done about It?
  作者：Mikkel H. S. Marqvorsen、Martin J. Pedersen、Michelle R. Rasmussen、Steffan K. Kristensen、Rasmus Dahl-Lassen、Henrik H. Jensen

  DOI：10.1021/acs.joc.6b02305

  日期：2017.1.6

  chemical glycosylation is challenging since direct reactions are low yielding. This issue, generally agreed upon to be caused by an intermediate 1,2-oxazoline, is often bypassed by introducing extra synthetic steps to avoid the presence of the NHAc functional group during glycosylation. The present paper describes new fundamental mechanistic insights into the inherent challenges of performing direct glycosylation

  单糖N-乙酰基-d-葡糖胺（GlcNAc）是天然存在的低聚糖中丰富的组成部分，但是由于直接反应的收率低，因此通过化学糖基化的方法引入葡糖胺极具挑战性。通常认为是由中间体1,2-恶唑啉引起的此问题通常通过引入额外的合成步骤来避免，以避免在糖基化过程中出现NHAc官能团。本文介绍了对使用GlcNAc执行直接糖基化的内在挑战的新的基本机械学见解。这些结果表明，控制恶唑啉形成和糖基化的平衡是获得可接受的化学收率的关键。通过运用这种推理方法直接与GlcNAc的传统硫糖苷供体直接进行糖基化，否则其糖基化收率不佳，
• Selective pivaloylation of 2-acetamido-2-deoxy sugars
  作者：Đurđica Ljevaković、Srdanka Tomić、Jelka Tomašić

  DOI：10.1016/0008-6215(88)84003-5

  日期：1988.11

  Selective pivaloylation of 2-acetamido-2-deoxy-D-glucose, its methyl alpha- and beta-glycosides, and the methyl alpha-glycoside of N-acetyl-D-muramic acid under various conditions has been studied. The structures of the products were established by 1H-n.m.r. spectroscopy and acetylation. The orders of acylation, HO-6 greater than HO-3 greater than HO-1 greater than HO-4 for 2-acetamido-2-deoxy-D-glucose

  已经研究了在各种条件下2-乙酰氨基-2-脱氧-D-葡萄糖，其甲基α-和β-糖苷以及N-乙酰基-D-山梨酸的甲基α-糖苷的选择性聚乙烯醇化。通过1H-nmr光谱和乙酰化确定产物的结构。酰化的顺序是：对于2-乙酰氨基-2-脱氧-D-葡萄糖，HO-6大于HO-3大于HO-1大于HO-1，对于HO2大于HO-4大于HO-3。建立了它的甲基糖苷。2-乙酰氨基-2-脱氧-3,6-二-O-新戊酰-吡喃葡萄糖苷和2-乙酰氨基-2-脱氧-1,3,4,6-四-O-新戊酰甲基-D-吡喃葡萄糖被兔血清酯酶水解。