5-(1-hydroxy-1-methylethyl)-6-bromo-1,3-benzodioxole | 148517-80-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并间二氧杂环戊烯类
• 英文名称: 5-(1-hydroxy-1-methylethyl)-6-bromo-1,3-benzodioxole
• 英文别名: 2-(6-bromobenzo[d][1,3]dioxol-5-yl)propan-2-ol；2-(6-bromo-1,3-benzodioxol-5-yl)propan-2-ol；2-(6-Bromo-1,3-dioxaindan-5-yl)propan-2-ol
• CAS: 148517-80-0
• 化学式: C₁₀H₁₁BrO₃
• 分子量: 259.1
• InChiKey: VYYPZUAQZZQOAN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  38.7
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  5-(1-hydroxy-1-methylethyl)-6-bromo-1,3-benzodioxole 在 palladium diacetate 、 caesium carbonate 、 三苯基膦 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 12.0h， 以60%的产率得到6,6-dimethyl-6H-[1,3]benzodioxolo[5,6-c][1,3]dioxolo[4,5-g]chromene
  参考文献：
  名称：

  多米诺钯催化双O-H键活化形成C-C和C-O键：合成6,6-二烷基-6 H-苯并[ c ]苯并二甲基苯

  摘要：

  提出了α，α-二烷基-（2-溴芳基）甲醇有效的钯催化多米诺反应为6,6-二烷基-6 H-苯并[ c ]色烯的反应。它们的形成可以通过一个五元的Pd（II）循环来解释，该循环有效地涉及与第二个分子的多米诺骨牌同质偶联，β碳裂解以及最后的分子内布赫瓦尔德-哈特维格环化。这种多米诺骨牌工艺实际上涉及打破五个σ键（2C–Br，2O–H和C–C）和形成两个新的σ键（CC和C–O）。这种机理途径是前所未有的，并进一步说明了过渡金属催化的作用。

  DOI：

  10.1021/ol2032625
• 作为产物：
  描述：

  1-(6-bromobenzo[d][1,3]dioxol-5-yl)ethanol 在 silica gel 、 pyridinium chlorochromate 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 5.0h， 生成 5-(1-hydroxy-1-methylethyl)-6-bromo-1,3-benzodioxole
  参考文献：
  名称：

  通过钯催化的取代控制的邻溴苄醇的官能化：二甲苯和茚基的合成

  摘要：

  提出了一种有效的多米诺骨牌钯催化的简单的邻溴苄苄基叔醇向色烯的转化。据信它们的形成是通过形成五元的palladacycle来进行的，而该五元的palladacycle又与第二邻位分子发生了分子间的均质偶联。-溴苄基叔醇产生均联-芳基键，然后形成分子内C-O键。有趣的是，当苄基碳原子上存在一个烯丙基取代基时，观察到化学选择性开关，其优选分子内Heck偶联并得到茚基。此外，已经证实叔醇官能团对于提供偶联产物必不可少，而伯/仲苄醇的使用则通过可能的还原脱溴和随后的氧化作用提供了简单的羰基产物，这归因于β-氢的存在（ s）。

  DOI：

  10.1021/jo402763m

文献信息

• Synthesis of Multisubstituted Triphenylenes and Phenanthrenes by Cascade Reaction of <i>o</i>-Iodobiphenyls or (<i>Z</i>)-β-Halostyrenes with <i>o</i>-Bromobenzyl Alcohols through Two Sequential C–C Bond Formations Catalyzed by a Palladium Complex
  作者：Masayuki Iwasaki、Yasuhiro Araki、Shohei Iino、Yasushi Nishihara

  DOI：10.1021/acs.joc.5b01693

  日期：2015.9.18

  bearing both nucleophilic and electrophilic substituents, for the facile synthesis of polycyclic aromatic hydrocarbons. A palladium/electron-deficient phosphine catalyst efficiently coupled o-iodobiphenyls or (Z)-β-halostyrenes with o-bromobenzyl alcohols to afford triphenylenes and phenanthrenes, respectively. The present cascade reaction proceeded through deacetonative cross-coupling and sequential intramolecular

  邻溴苄醇已被开发为一种新型的带有亲核和亲电取代基的环化试剂，可轻松合成多环芳烃。钯/电子不足的膦催化剂有效地将邻碘联苯或（Z）-β-卤代苯乙烯与邻溴苄醇偶联，分别制得三亚苯基和菲。目前的级联反应是通过去乙酰化交叉偶联和顺序分子内环化进行的。大量实验数据表明，反应机理涉及1,4-钯迁移的平衡。
• Phenanthrene Synthesis by Palladium-Catalyzed Benzannulation with <i>o</i>-Bromobenzyl Alcohols through Multiple Carbon–Carbon Bond Formations
  作者：Masayuki Iwasaki、Yasuhiro Araki、Yasushi Nishihara

  DOI：10.1021/acs.joc.7b00848

  日期：2017.6.16

  benzannulation with o-bromobenzyl alcohols enabled the facile construction of phenanthrene skeletons via the sequential multiple carbon–carbon bond formations. A variety of multisubstituted phenanthrenes were synthesized by the reaction of (Z)-β-halostyrenes with o-bromobenzyl alcohols as well as by the three-component coupling of alkynes, aryl bromides, and o-bromobenzyl alcohols. The electron-deficient phosphine

  邻溴苄醇与钯催化的苯环合可以通过连续的多个碳-碳键形成而轻松地构建菲骨架。多种多取代菲的通过的（反应合成Ž）-β-卤代苯乙烯与ö -bromobenzyl醇以及由炔烃组成的三组分偶联，芳基溴化物和ö-溴苄醇。缺电子的膦配体在控制所用的两种不同有机卤化物的顺序氧化加成中起着重要作用，从而实现了以良好的收率选择性形成所需的菲。该合成方案也适用于高度稠合的多环芳族烃如四苯的合成。
• Palladium‐Catalyzed Suzuki Coupling and NIS‐Mediated Dehydrogenative Cylcoetherification: A Concise Approach to 6,6‐Disubstituted 6 <i>H</i> ‐benzo[ <i>c</i> ]chromenes and Total Synthesis of Didehydroconicol
  作者：Chander Shekhar、Gedu Satyanarayana

  DOI：10.1002/ejoc.202101444

  日期：2022.5.13

  Herein, we report a concise approach of 6,6-disubstituted 6H-benzo[c]chromenes in a two-step sequence starting from ortho-bromo benzylic alcohols and arylboronic acids, using intermolecular palladium-catalyzed C−C and intramolecular N-Iodosuccinimide (NIS) mediated key C−O bonds construction.

  在此，我们报告了一种从邻溴苯甲醇和芳基硼酸开始的两步序列中 6,6-二取代 6 H-苯并[ c ]色烯的简明方法，使用分子间钯催化的 C - C 和分子内N-碘代琥珀酰亚胺 (NIS) 介导了关键的 C-O 键构建。
• The vinylogous Catellani reaction: a combined computational and experimental study
  作者：Y. Yamamoto、T. Murayama、J. Jiang、T. Yasui、M. Shibuya

  DOI：10.1039/c7sc04265e

  日期：——

  In the presence of 5 mol% Pd(OAc)2, 1 equiv. of norbornene, and K2CO3, the reaction of 4-iodo-2-quinolones with tertiary o-bromobenzylic alcohols produced the desired benzopyran-fused 2-quinolones in moderate to high yields. A Catellani-type mechanism involving vinylic C–H cleavage is proposed based on the results of control experiments and density functional theory calculations.

  在5mol％Pd（OAc）2的存在下，1当量。降冰片烯和K 2 CO 3的作用下，4-碘-2-喹诺酮与叔邻溴苄醇的反应以中等至高产率产生了所需的苯并吡喃稠合的2-喹诺酮。基于控制实验和密度泛函理论计算的结果，提出了一种涉及乙烯基C–H裂解的Catellani型机理。
• Intramolecular anodic carbon-carbon bond-forming reactions of oxidized phenol intermediates leading to spirodienones. Structural effects on reactivity and evidence for a phenoxonium ion intermediate
  作者：John S. Swenton、Kenneth Carpenter、Ying Chen、Michael L. Kerns、Gary W. Morrow

  DOI：10.1021/jo00064a017

  日期：1993.6

  Anodic oxidation of 4-phenylphenol in methanol leads to 4-methoxy-4-phenylcyclohexa-2,5-dienones whereas anodic oxidation of 4-(2-alkenylphenyl)-phenols leads to spirocyclic 2,5-cyclohexadienones in competition with methanol addition to the 4-position. Using 4-phenylphenol and (4-(2-propenylphenyl)phenol as model systems, the optimum conditions for solvent addition versus carbon-carbon bond formation have been studied. The yield of the anodic cyclization reaction shows a dramatic dependence on olefin structure. Whereas 4-(2-propenylphenyl)phenol gives the spirocyclic 2,5-cyclohexadienone in high yield, 4-(2-vinylphenyl)phenol affords the analogous product in only 16 % yield. This low yield of intramolecular carbon-carbon bond-forming reactions can be markedly improved if the vinyl substituent is forced closer to the 4-position of the phenol by the buttressing effect of a o-methyl group. Coloumetric studies as well as the oxidation chemistry of a (4-hydroxyphenyl)(2-propenylaryl)methane derivative support the involvement of a phenoxonium ion as the intermediate in these carbon-carbon bond-forming reactions. Finally, non-oxidative generation of a phenoxonium ion by reaction of 4-hydroxy-4-(2-propenylphenyl)2,5-cyclohexadieneone with methanesulfonyl chloride/triethylamine leads to spirodienones related to those isolated in the anodic oxidation chemistry. Although a slightly acidic media is critical for obtaining good yields of spirodienones for the propenyl system, anodic oxidation of the trimethylsilyl derivatives of the phenol allows this reaction to be performed in neutral or slightly basic media.