(R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trimethoxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid | 117832-92-5

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: (R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trimethoxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
• 英文别名: (4R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trimethoxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
• CAS: 117832-92-5
• 化学式: C₂₇H₄₆O₅
• 分子量: 450.659
• InChiKey: IURIUOSJRGZFFZ-OCCHXLOTSA-N

物化性质

• 沸点：
  536.9±50.0 °C(Predicted)
• 密度：
  1.08±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.2
• 重原子数：
  32
• 可旋转键数：
  7
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.96
• 拓扑面积：
  65
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trimethoxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid 在 4-二甲氨基吡啶 、 正丁基锂 、 氯化亚砜 、 水 、 N,N-二异丙基乙胺 、 N,N'-二环己基碳二亚胺 、 sodium hydroxide 作用下， 以 四氢呋喃 、 甲醇 、 正己烷 、 二氯甲烷 、 水 为溶剂， 反应 58.25h， 生成 (4R)-tert-butyl 2-methyl-4-((3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trimethoxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentaneperoxoate
  参考文献：
  名称：

  氟转移到烷基自由基

  摘要：

  随着含氟药物的重要性不断提高，有机化合物选择性氟化新合成技术的发展也在增加。可能适用于药物合成的传统方法依赖于使用离子形式的氟（F(-)​​ 或 F(+)）。激进的方法虽然作为一种补充方法具有潜在吸引力，但由于缺乏安全的原子氟 (F(•)) 来源而受到阻碍。已开发出一种新的烷基氟化方法，该方法利用试剂 N-氟苯磺酰亚胺作为氟转移剂到烷基自由基。这种方法适用于广泛的烷基自由基，包括伯、仲、叔、苄基和杂原子稳定的自由基。此外，计算表明，含氟离子试剂可能是将这种方法进一步扩展到极性反应介质的候选者。在烷基自由基氟化中使用这些试剂有可能实现强大的新转化，否则将需要多个合成步骤。

  DOI：

  10.1021/ja211679v
• 作为产物：
  描述：

  胆酸甲酯 在 sodium hydroxide 、 sodium hydride 作用下， 以 1,4-二氧六环 、 甲醇 、 苯 为溶剂， 反应 74.0h， 生成 (R)-4-[(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-3,7,12-trimethoxy-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
  参考文献：
  名称：

  Ion Conductors Derived from Cholic Acid and Spermine:  Importance of Facial Hydrophilicity on Na⁺ Transport and Membrane Selectivity

  摘要：

  A series of ion conductors have been synthesized in which the degree of facial hydrophilicity has been systematically varied. Specifically, conjugates have been prepared from cholic acid and spermine in which the hydrophilic face of each sterol bears methoxy (1), hydroxy (2), carbamate (3), or sulfate groups (4). The ability of these conjugates to promote the transport of Na+ across phosphatidylcholine membranes of varying thickness has been investigated by Na-23 NMR spectroscopy. Examination of observed activities in three different phosphatidylcholine membranes has provided evidence for membrane-spanning dimers as the transport-active species. In the thinnest membranes investigated, made from 1,2-dimyristoleoyl-sn-glycero-3-phosphocholine (C14), Na+-transport activity was found to increase, substantially, with increasing facial hydrophilicity. In thicker membranes, made from 1,2-dioleoyl-sn-glycero-3-phosphocholine (C18), observed activities were found to decrease with increasing facial hydrophilicity; with a membrane of intermediate thickness, prepared from 1,2-dipalmitoleoyl-sn-glycero-3-phosphocholine (C16), ion-conducting activity increased and then decreased, with continuous increases in facial hydrophilicity. The possible origins for these variations in activity are briefly discussed.

  DOI：

  10.1021/ja010926m

文献信息

• A Bifunctional Copper Catalyst Enables Ester Reduction with H₂: Expanding the Reactivity Space of Nucleophilic Copper Hydrides
  作者：Birte M. Zimmermann、Trung Tran Ngoc、Dimitrios-Ioannis Tzaras、Trinadh Kaicharla、Johannes F. Teichert

  DOI：10.1021/jacs.1c09626

  日期：2021.10.13

  activation of esters through hydrogen bonding and formation of nucleophilic copper(I) hydrides from H2, resulting in a catalytic hydride transfer to esters. The reduction step is further facilitated by a proton shuttle mediated by the guanidinium subunit. This bifunctional approach to ester reductions for the first time shifts the reactivity of generally considered “soft” copper(I) hydrides to previously

  采用基于铜 (I)/NHC 配合物和胍有机催化剂的双功能催化剂，促进了以 H 2作为末端还原剂的催化酯还原成醇。这里采用的方法能够通过氢键同时活化酯，并从 H 2形成亲核的氢化铜 (I) ，从而导致氢化物催化转移到酯。由胍亚基介导的质子穿梭进一步促进了还原步骤。这种酯还原的双功能方法首次将通常认为的“软”氢化铜 (I) 的反应性转变为以前不反应的“硬”酯亲电子试剂，并为用催化剂和 H 2替代化学计量还原剂铺平了道路.
• Broadly Applicable Ytterbium-Catalyzed Esterification, Hydrolysis, and Amidation of Imides
  作者：Céline Guissart、Andre Barros、Luis Rosa Barata、Gwilherm Evano

  DOI：10.1021/acs.orglett.8b01896

  日期：2018.9.7

  An efficient, broadly applicable, operationally simple, and divergent process for the transformation of imides into a range of carboxylic acid derivatives under mild conditions is reported. By simply using catalytic amounts of ytterbium(III) triflate as a Lewis acid promoter in the presence of alcohols, water, amines, or N,O-dimethylhydroxylamine, a broad range of imides is smoothly and readily converted

  报道了一种在温和条件下将酰亚胺转化为一系列羧酸衍生物的有效，广泛适用，操作简单和发散的方法。通过简单地使用催化量的镱（III），三氟甲磺酸，如醇的存在下，路易斯酸的启动子，水，胺，或Ñ，Ô -dimethylhydroxylamine，宽范围的酰亚胺是平滑且容易地转化为相应的酯，羧酸，酰胺和Weinreb酰胺的收率很高。该方法尤其使得容易裂解基于恶唑烷酮的助剂。
• A General Copper-Catalyzed Vinylic Halogen Exchange Reaction
  作者：Antoine Nitelet、Gwilherm Evano

  DOI：10.1021/acs.orglett.6b00678

  日期：2016.4.15

  An efficient and general system for the halogen exchange reaction in alkenyl halides has been developed. Upon reaction with catalytic amounts of copper iodide and trans-N,N′-dimethylcyclohexane-1,2-diamine in the presence of tetramethylammonium chloride or bromide, a wide range of easily accessible alkenyl iodides can be smoothly transformed to their far less available chlorinated and brominated derivatives

  已经开发了用于链烯基卤化物中的卤素交换反应的有效且通用的系统。在与催化量的碘化铜和反应反式- ñ，Ñ在四甲基氯化铵或溴化铵，宽范围容易获得烯基碘化物的存在'N'-二甲基-1,2-二胺能够顺利地转化为它们的远较少可用氯化和溴化衍生物，具有极高的收率并完全保留了双键的几何形状。该反应还能够使溴代烯烃氯化，并且可以扩展到宝石-二溴代烯烃的使用。
• Catalytic Aerobic Chemoselective α-Oxidation of Acylpyrazoles en Route to α-Hydroxy Acid Derivatives
  作者：Seiya Taninokuchi、Ryo Yazaki、Takashi Ohshima

  DOI：10.1021/acs.orglett.7b01293

  日期：2017.6.16

  described. Acylpyrazoles, carboxylic acid oxidation state substrates, were efficiently oxidized under aerobic conditions using TEMPO as an oxygenating agent. The mild catalytic conditions of the present catalysis were amenable to late-stage α-oxidation of various pharmaceutical agents and natural products, leading to previously unreported α-hydroxy acid derivatives in short steps. Preliminary mechanistic

  描述了酰基吡唑的催化有氧化学选择性α-氧化。使用TEMPO作为氧化剂，在好氧条件下可有效地氧化酰基吡唑类（羧酸的氧化态底物）。本催化的温和催化条件适合于各种药物和天然产物的后期α-氧化，从而在短时间内导致先前未报道的α-羟基酸衍生物。初步的机理研究表明，原位生成的过氧化铜（II）可作为路易斯酸/布朗斯台德碱协同催化剂。
• <i>N</i>-Alkenylation of hydroxamic acid derivatives with ethynyl benziodoxolone to synthesize <i>cis</i>-enamides through vinyl benziodoxolones
  作者：Daisuke Shimbo、Toshifumi Maruyama、Norihiro Tada、Akichika Itoh

  DOI：10.1039/d1ob00055a

  日期：——

  (cis-β-N-RO-amide-VBXs) from O-alkyl hydroxamic acids in the presence of an ethynyl benziodoxolone–acetonitrile complex (EBX–MeCN) is reported herein. The reaction was performed under mild conditions including an aqueous solvent, a mild base, and room temperature. The reaction tolerated various O-alkyl hydroxamic acids derived from carboxylic acids, such as amino acids, pharmaceuticals, and natural products

  本文报道了在乙炔基苯并恶唑啉酮-乙腈络合物（EBX-MeCN）存在下，由O-烷基异羟肟酸立体合成顺式-β- N-烷氧基酰胺乙烯基苯并恶唑烷（顺式-β - N -RO-酰胺-VBXs）。反应在温和的条件下进行，所述条件包括水性溶剂，温和的碱和室温。该反应容许各种衍生自羧酸的O-烷基异羟肟酸，例如氨基酸，药物和天然产物。还使用氧化氘作为氘源合成了乙烯基双氘化的顺式-β - N -MeO-酰胺-VBXs。缬氨酸衍生的顺式将-β - N - MeO-酰胺-VBX立体定向衍生为异羟肟酸衍生的顺式-酰胺，而不会失去立体选择性或降低氘/氢比。