(R)-tert-butyl 2-(2-ethoxy-1-hydroxy-2-oxoethyl)-1H-pyrrole-1-carboxylate | 1259290-86-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯
• 英文名称: (R)-tert-butyl 2-(2-ethoxy-1-hydroxy-2-oxoethyl)-1H-pyrrole-1-carboxylate
• 英文别名: tert-butyl 2-[(1R)-2-ethoxy-1-hydroxy-2-oxoethyl]pyrrole-1-carboxylate
• CAS: 1259290-86-2
• 化学式: C₁₃H₁₉NO₅
• 分子量: 269.298
• InChiKey: ASSDJTGHVABAPL-SNVBAGLBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  19
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.54
• 拓扑面积：
  77.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  N-(tert-butoxycarbonyl)-2-(trimethylsilyl)pyrrole 在 盐酸 、 C₄₄H₃₂P₂Pd⁽²⁺⁾*2F₆Sb^(1-) 作用下， 以 四氢呋喃 、 二氯甲烷 、 水 为溶剂， 反应 6.0h， 生成 (R)-tert-butyl 2-(2-ethoxy-1-hydroxy-2-oxoethyl)-1H-pyrrole-1-carboxylate
  参考文献：
  名称：

  Catalytic and highly enantioselective Friedel–Crafts type reactions of heteroaromatic compounds with trifluoropyruvate and glyoxylate by a dicationic palladium complex

  摘要：

  The highly enantioselective Friedel-Crafts alkylation of furan and thiophene derivatives with trifluoropyruvate, which have never provided the high level of asymmetric induction and yield until now, was achieved by using dicationic palladium complexes as Lewis acid catalysts. Moreover, glyoxylate instead of trifluoropyruvate as an electrophile led to complete change of regioselectivity with 2-trimethylsilylated furan, thiophene, and pyrrole derivatives to give the corresponding heteroarylated products in high yields and enantioselectivities. The respective products with trifluoropyruvate and glyoxylate could also be obtained via sequential catalytic reaction; intramolecular cyclization of alkynyldiols using cationic Au catalyst followed by Friedel-Crafts type reactions using dicationic Pd catalyst. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2014.06.013

文献信息

• Catalytic Enantioselective Arylation of Glyoxylate with Arylsilanes: Practical Synthesis of Optically Active Mandelic Acid Derivatives
  作者：Kohsuke Aikawa、Yūta Hioki、Koichi Mikami

  DOI：10.1002/asia.201000522

  日期：2010.11.2

  a little does the trick! The catalytic enantioselective arylation using chiral dicationic palladium complexes provides a reliable and useful access to enantiomerically enriched mandelic‐acid derivatives. Significantly low catalyst loading (down to 0.002 mol %) as well as easy catalyst handling are the advantage of this practical method.

  只是一点点的把戏！使用手性阳离子型钯配合物催化对映选择性芳基化提供了对映体富集的扁桃酸衍生物的可靠和有用的途径。这种实用方法的优点是催化剂负载量低（低至0.002 mol％）以及易于催化剂处理。