(R)-1-bromo-4-methyloct-2-yne | 192655-95-1

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 有机溴化物
• 英文名称: (R)-1-bromo-4-methyloct-2-yne
• 英文别名: (4R)-1-bromo-4-methyloct-2-yne
• CAS: 192655-95-1
• 化学式: C₉H₁₅Br
• 分子量: 203.122
• InChiKey: BZNRRROLQNHVQF-SECBINFHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  10
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.78
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  (R)-1-bromo-4-methyloct-2-yne 在 bis(1,5-cyclooctadiene)nickel (0) 、 molecular sieve 、 草酰氯 、 三丁基膦 、 四丁基氟化铵 、 potassium hydride 、 三乙胺 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 二甲基亚砜 为溶剂， 反应 18.0h， 生成 [(6E,7R,8R,8aS)-8-methyl-6-[(2R)-2-methylhexylidene]-8-phenylmethoxy-1,2,3,5,7,8a-hexahydroindolizin-7-yl]oxy-triethylsilane
  参考文献：
  名称：

  Nickel Catalysis in the Stereoselective Preparation of Quinolizidine, Pyrrolizidine, and Indolizidine Alkaloids:  Total Synthesis of (+)-Allopumiliotoxin 267A

  摘要：

  DOI：

  10.1021/ja990997+
• 作为产物：
  描述：

  (R)-4-methyl-2-octyn-1-ol 在 四溴化碳 、 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 以96%的产率得到(R)-1-bromo-4-methyloct-2-yne
  参考文献：
  名称：

  通过后期镍催化的环氧-炔烃还原环化反应，可合成全毒素209F和251D

  摘要：

  铝毒素209F和251D使用高度选择性的镍催化环氧化物炔还原环化反应作为最终步骤合成。在大多数pumiliotoxins毒素中发现的环外（Z）烯烃是立体定向和区域选择性形成的，无需在炔烃上使用导向基团，并且环氧化物仅在受阻较小的碳上开环以提供所需的叔醇。使用非对映选择性地将sulf代氧鎓阴离子加到脯氨酸衍生的甲基酮中来制备环氧化物。

  DOI：

  10.1021/jo071132e

文献信息

• Nickel-Catalyzed Preparation of Bicyclic Heterocycles:  Total Synthesis of (+)-Allopumiliotoxin 267A, (+)-Allopumiliotoxin 339A, and (+)-Allopumiliotoxin 339B
  作者：Xiao-Qing Tang、John Montgomery

  DOI：10.1021/ja001440t

  日期：2000.7.26

  A new method for the reductive cyclization of ynals involving a Ni(COD)2/PBu3 catalyst system to produce allylic alcohols was developed. The triethylsilane-mediated procedure allows preparation of ...

  开发了一种涉及 Ni(COD)2/PBu3 催化剂体系的 ynals 还原环化生产烯丙醇的新方法。三乙基硅烷介导的程序允许制备...
• Efficient and Practical Method for Synthesizing N-Heterocyclic Compounds Using Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by Ti(O-<i>i</i>-Pr)₄/2<i>i</i>-PrMgX Reagent. Synthesis of Quinolones, Pyrroles, Indoles, and Optically Active N-Heterocycles Including Allopumiliotoxin Alkaloid 267A
  作者：Sentaro Okamoto、Masayuki Iwakubo、Katsushige Kobayashi、Fumie Sato

  DOI：10.1021/ja970810j

  日期：1997.7.1

  Treatment of N-(2- or 3-alkynyl)amino esters with a low-valent titanium reagent diisopropoxy(eta(2)-propene)titanium (1), generated in situ by the reaction of Ti(O-i-Pr)(4) and 2i-PrMgCl, resulted in an intramolecular nucleophilic acyl substitution (INAS) reaction to afford alpha-alkylidene-pyrrolidinones or -piperidinones. Thus, treatment of N-propargyl-anthranilates 5, -indole-2-carboxylates 10, or -pyrrole-2-carboxylates 13 with 1 gave 4-quinolones 7, [1,2-a]indoles, or [1,2-a]pyrroles, respectively. Similarly, N-alkynylated alpha- or beta-amino esters 14 or 15 with 1 afforded N-heterocycles 18 or 19. In the reaction of N-(2- or 3-alkenyl)amino esters with 1, the resulting INAS product underwent intramolecular carbonyl addition (ICA) reaction to afford the N-heterocyclic compounds having a cyclopropanol moiety in good to excellent yields. Thus, the treatment of N-alkenyl-anthranilate 4a, -indole-2-carboxylates 8 and 9, or -pyrrole-2-carboxylates 11 and 12 with 1 gave the corresponding quinoline derivative 6a, [1,2-a]indoles, or [1,2-a]pyrroles, respectively. The optically active N-heterocyclic compounds 20 and 21 were obtained from N-alkenylated alpha- or beta-amino esters 16 or 17. A highly efficient total synthesis of allopumiliotoxin alkaloid 267A has also been accomplished. Thus, the N-propargyl-2[(1-hydroxy-1-methoxycarbonyl)ethyl]pyrrolidine 24 (from L-proline in six steps) reacted with 1 to afford the corresponding indolidinone 25 in 67% yield, which has previously been converted to allopumiliotoxin 267A.
• Total Synthesis of Pumiliotoxins 209F and 251D via Late-Stage, Nickel-Catalyzed Epoxide−Alkyne Reductive Cyclization
  作者：Katrina S. Woodin、Timothy F. Jamison

  DOI：10.1021/jo071132e

  日期：2007.9.1

  Pumiliotoxins 209F and 251D were synthesized using highly selective nickel-catalyzed epoxide−alkyne reductive cyclizations as the final step. The exocyclic (Z)-alkene found in the majority of the pumiliotoxins was formed stereospecifically and regioselectively, without the use of a directing group on the alkyne, and the epoxide underwent ring opening exclusively at the less hindered carbon to provide

  铝毒素209F和251D使用高度选择性的镍催化环氧化物炔还原环化反应作为最终步骤合成。在大多数pumiliotoxins毒素中发现的环外（Z）烯烃是立体定向和区域选择性形成的，无需在炔烃上使用导向基团，并且环氧化物仅在受阻较小的碳上开环以提供所需的叔醇。使用非对映选择性地将sulf代氧鎓阴离子加到脯氨酸衍生的甲基酮中来制备环氧化物。
• Nickel Catalysis in the Stereoselective Preparation of Quinolizidine, Pyrrolizidine, and Indolizidine Alkaloids:  Total Synthesis of (+)-Allopumiliotoxin 267A
  作者：Xiao-Qing Tang、John Montgomery

  DOI：10.1021/ja990997+

  日期：1999.6.1