(R)-2-benzylcyclohexanone

• 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-benzylcyclohexanone
• 英文别名: (R)-2-benzylcyclohexan-1-one；2-benzylcyclohexan-1-one；(2R)-2-benzylcyclohexan-1-one
• 化学式: C₁₃H₁₆O
• 分子量: 188.269
• InChiKey: CUYLPYBYCYQGCE-GFCCVEGCSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  14
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (R)-2-benzylcyclohexanone 在 间氯过氧苯甲酸 作用下， 以 二氯甲烷 为溶剂， 以99%的产率得到(R)-7-benzyloxacycloheptan-2-one
  参考文献：
  名称：

  Application of microbial enantiofacially selective hydrolysis in natural product synthesis

  摘要：

  Pichinia farinosa IAM 4682 mediated enantiofacially selective hydrolysis worked efficiently (65-70% yield) on the interface-bioreactor in a reproducible manner, which established the product, (R)-2-benzylcyclohexanone (84-87%e.e.), to be the starting material for the synthesis of optically active natural products. Methyl (R)3-hydroxy-12- methyltridecanoate. a constituent of lipopolysaccharide, and (R)-1,3-nonanediol, a secretion of cucumber fly, were synthesized via this common intermediate, of which the optically active secondary alcohol moiety was derived from the above chiral ketone by Baeyer-Villiger oxidation. Final products were enantiomerically enriched to 94-95% e.e., by the lipase-mediated enantioselective transesterification which could remove the minor enantiomer as the corresponding acetate.

  DOI：

  10.1016/s0957-4166(00)86269-2
• 作为产物：
  描述：

  苄基碘 在 高氯酸 、 硫酸 、 potassium carbonate 、 溶剂黄146 作用下， 以 四氯化碳 、 水 、 丙酮 为溶剂， 反应 30.0h， 生成 (R)-2-benzylcyclohexanone
  参考文献：
  名称：

  Matsumoto, Kazutsugu; Tsutsumi, Seiji; Ihori, Tamiko, Journal of the American Chemical Society, 1990, vol. 112, # 26, p. 9614 - 9619

  摘要：

  DOI：

文献信息

• Highly Enantioselective Iridium-Catalyzed Hydrogenation of Conjugated Trisubstituted Enones
  作者：Bram B. C. Peters、Jira Jongcharoenkamol、Suppachai Krajangsri、Pher G. Andersson

  DOI：10.1021/acs.orglett.0c04012

  日期：2021.1.1

  Asymmetric hydrogenation of conjugated enones is one of the most efficient and straightforward methods to prepare optically active ketones. In this study, chiral bidentate Ir–N,P complexes were utilized to access these scaffolds for ketones bearing the stereogenic center at both the α- and β-positions. Excellent enantiomeric excesses, of up to 99%, were obtained, accompanied with good to high isolated

  共轭烯酮的不对称氢化是制备光学活性酮的最有效，最直接的方法之一。在这项研究中，手性双齿Ir-N，P络合物被用于进入这些支架，以获得在α和β位置均具有立体中心的酮。获得了高达99％的出色的对映体过量，并具有良好或较高的分离产率。具有挑战性的二烷基取代的底物（很难通过令人满意的手性诱导进行氢化）以高度对映选择性的方式氢化。
• Formation, Alkylation, and Hydrolysis of Chiral Nonracemic <i>N</i>-Amino Cyclic Carbamate Hydrazones: An Approach to the Enantioselective α-Alkylation of Ketones
  作者：Uyen Huynh、Stacey L. McDonald、Daniel Lim、Md. Nasir Uddin、Sarah E. Wengryniuk、Sumit Dey、Don M. Coltart

  DOI：10.1021/acs.joc.8b00655

  日期：2018.11.2

  as α-functionalized ketones or derivatives thereof. We previously reported our preliminary studies on the development of a new enantioselective ketone α-alkylation procedure using N-amino cyclic carbamate (ACC) auxiliaries. In comparison to other auxiliary-based methods, ACC alkylation offers a number of advantages and is both highly enantioselective and high yielding. Herein, we provide a full account

  酮的α-烷基化是基本的合成转化。鉴于许多天然产物，药物和相关化合物以α-官能化的酮或其衍生物形式存在，因此开发该反应的不对称变体非常重要。我们以前曾报道过使用N-氨基环状氨基甲酸酯（ACC）助剂开发新的对映选择性酮α-烷基化程序的初步研究。与其他基于辅助方法的方法相比，ACC烷基化具有许多优势，并且具有高对映选择性和高收率。在此，我们全面介绍了对映选择性ACC酮α-烷基化方法的研究。
• A Brønsted Acid Catalyst for the Enantioselective Protonation Reaction
  作者：Cheol Hong Cheon、Hisashi Yamamoto

  DOI：10.1021/ja8041542

  日期：2008.7.1

  A highly reactive and robust chiral Brønsted acid catalyst, chiral N-triflyl thiophosphoramide, was developed. The first metal-free Brønsted acid catalyzed enantioselective protonation reaction of silyl enol ethers was demonstrated using this chiral Brønsted acid catalyst. The catalyst loading could be reduced to 0.05 mol % without any deleterious effect on the enantioselectivity.

  开发了一种高反应性和稳健的手性布朗斯台德酸催化剂，手性 N-三氟甲磺酸硫代磷酰胺。使用这种手性布朗斯台德酸催化剂证明了第一个无金属布朗斯台德酸催化的甲硅烷基烯醇醚的对映选择性质子化反应。催化剂负载量可以降低到 0.05 mol%，而对对映选择性没有任何不利影响。
• Stereoselective reactions. 30. Enantioselective alkylation of the lithium enolates of six-membered cyclic ketones using tetradentate chiral amines in the presence of lithium bromide
  作者：Masatoshi Murakata、Tatsuro Yasukata、Takumi Aoki、Makoto Nakajima、Kenji Koga

  DOI：10.1016/s0040-4020(98)00009-x

  日期：1998.3

  An efficient enantioselective alkylation of the lithium enolates of cyclohexanone and I-tetralone with reactive alkyl halides was realized using a stoichiometric amount of a tetradentate chiral amine as a ligand for the lithium in the presence of lithium bromide in toluene.

  在甲苯中存在溴化锂的情况下，使用化学计量的四齿手性胺作为锂的配体，实现了环己酮和I-四氢萘酮的烯醇锂与反应性烷基卤化物的有效对映选择性烷基化。
• Giving a Second Chance to Ir/Sulfoximine-Based Catalysts for the Asymmetric Hydrogenation of Olefins Containing Poorly Coordinative Groups
  作者：Maria Biosca、Oscar Pàmies、Montserrat Diéguez

  DOI：10.1021/acs.joc.9b00829

  日期：2019.6.21

  This work identifies a family of Ir/phosphite-sulfoximine catalysts that has been successfully used in the asymmetric hydrogenation of olefins with poorly coordinative or noncoordinative groups. In comparison with analogue Ir/phosphine-sulfoximine catalysts previously reported, the presence of a phosphite group extended the range of olefins than can be efficiently hydrogenated. High enantioselectivities

  这项工作确定了Ir /亚磷酸酯-亚砜亚胺催化剂系列，已成功用于配位或非配位基团较弱的烯烃的不对称加氢中。与先前报道的类似的Ir /膦-亚砜亚胺催化剂相比，亚磷酸酯基团的存在扩展了烯烃的范围，而无法有效地氢化。对于包含相关的弱配位基团的各种烯烃（例如α，β-不饱和烯酮，酯，内酯和内酰胺以及烯基硼酸酯），已经实现了与对等最佳化合物相当的高对映选择性。