(R)-2-(1,4-diphenyl-2-butyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane | 935662-30-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (R)-2-(1,4-diphenyl-2-butyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
• 英文别名: (R)-(1,4-diphenylbutan-2-yl)pinacolborane
• CAS: 935662-30-9
• 化学式: C₂₂H₂₉BO₂
• 分子量: 336.282
• InChiKey: DGUUGFWXIHSOTE-HXUWFJFHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.32
• 重原子数：
  25.0
• 可旋转键数：
  6.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  18.46
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为反应物：
  描述：

  (R)-2-(1,4-diphenyl-2-butyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 在 正丁基锂 、 叔丁基锂 作用下， 以 四氢呋喃 、 甲苯 、 正戊烷 为溶剂， 反应 32.0h， 生成 (2S,4R)-4-benzyl-1,6-diphenylhexan-2-ol
  参考文献：
  名称：

  Iterative Stereospecific Reagent-Controlled Homologation of Pinacol Boronates by Enantioenriched α-Chloroalkyllithium Reagents

  摘要：

  Reaction of pinacol boronates with putative enantioenriched alpha-chloroalkyllithium species, generated in situ from homochiral alpha-chloroalkylsulfoxides by sulfoxide ligand exchange with t-BuLi in PhMe at -78 degrees C, gave chain-extended boronic ester products with generally excellent stereochemical fidelity. Iteration of this stereospecific reagent-controlled homologation (StReCH) process enabled the programmed synthesis of all four stereoisomers of a stereodiad-containing model system (4-benzyl-1,6-diphenylhexan-2-ol) with er >= 97:3 in all cases.

  DOI：

  10.1021/ja068808s
• 作为产物：
  描述：

  (S_S)-2-phenylethyl p-tolyl sulfoxide 在 N-氯代丁二酰亚胺 、 叔丁基锂 、 potassium carbonate 作用下， 以 二氯甲烷 、 甲苯 、 正戊烷 为溶剂， 反应 135.0h， 生成 (R)-2-(1,4-diphenyl-2-butyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane
  参考文献：
  名称：

  Iterative Stereospecific Reagent-Controlled Homologation of Pinacol Boronates by Enantioenriched α-Chloroalkyllithium Reagents

  摘要：

  Reaction of pinacol boronates with putative enantioenriched alpha-chloroalkyllithium species, generated in situ from homochiral alpha-chloroalkylsulfoxides by sulfoxide ligand exchange with t-BuLi in PhMe at -78 degrees C, gave chain-extended boronic ester products with generally excellent stereochemical fidelity. Iteration of this stereospecific reagent-controlled homologation (StReCH) process enabled the programmed synthesis of all four stereoisomers of a stereodiad-containing model system (4-benzyl-1,6-diphenylhexan-2-ol) with er >= 97:3 in all cases.

  DOI：

  10.1021/ja068808s

文献信息

• Deoxygenative Haloboration and Enantioselective Chloroboration of Carbonyls
  作者：Dong Wang、Jun Zhou、Zihao Hu、Tao XU

  DOI：10.1021/jacs.2c11024

  日期：2022.12.21

  α-haloboronates. Meanwhile, the difficult-to-obtain tertiary α-haloboronates can be also readily prepared via the same strategy with ketones. Furthermore, enantioselective chloroboration of carbonyls was successfully achieved to give chiral secondary or tertiary α-chloroboronates, the important intermediates to access enantioenrich multisubstituted stereocenters. These versatile products can be surprisingly attained

  羰基的脱氧双功能化为构建孪生双功能基序提供了一种直接有效的途径。然而，由于C-O双键或随后形成的C-O键具有很强的键解离能，这一领域的研究非常具有挑战性。在此，我们报告了一种高效的醛脱氧卤化反应，可生成二级 α-卤代硼酸盐。同时，通过与酮相同的策略也可以很容易地制备难以获得的叔α-卤代硼酸盐。此外，成功地实现了羰基的对映选择性氯硼化，得到手性仲或叔 α-氯硼酸盐，这是获得富含对映体的多取代立体中心的重要中间体。这些多功能产品可以通过这种简单温和的过程令人惊讶地获得，具有显着的底物范围扩展和官能团耐受性。此外，这些反应可以在大规模上很好地进行，在应用中具有更多的实用价值。
• Enantioselective, Lewis Base-Catalyzed Carbosulfenylation of Alkenylboronates by 1,2-Boronate Migration
  作者：Zhonglin Tao、Kevin A. Robb、Jesse L. Panger、Scott E. Denmark

  DOI：10.1021/jacs.8b10288

  日期：2018.11.21

  A catalytic, enantioselective method for the preparation of chiral, non-racemic, alkylboronic esters bearing two vicinal stereogenic centers is described. The reaction proceeds via a 1,2-migration of a zwitterionic thiiranium-boronate complex to give exclusively anti carbosulfenylation products. A broad scope of aryl groups migrate with good yield and excellent enantioselectivity (up to 99:1 e.r.). Similarly, a range of di- and trisubstituted alkenylboronic esters are competent reaction partners. This method provides access to both secondary and tertiary chiral alkylboronic esters.