benzoin dimethyl ketal | 1889-85-6

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 二苯乙烯类
• 英文名称: benzoin dimethyl ketal
• 英文别名: Benzoin-dimethylacetal；2,2-Dimethoxy-1,2-diphenyl-aethan-1-ol；Benzoindimethylketal；2,2-Dimethoxy-1,2-diphenylethanol
• CAS: 1889-85-6
• 化学式: C₁₆H₁₈O₃
• 分子量: 258.317
• InChiKey: VSRMDJXITMVPNC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  19
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 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：

  benzoin dimethyl ketal 生成 trans-2,5-dimethoxy-2,3,5,6-tetraphenyl-1,4-dioxane
  参考文献：
  名称：

  Madelung; Oberwegner, Justus Liebigs Annalen der Chemie, 1931, vol. 490, p. 201,210, 225

  摘要：

  DOI：
• 作为产物：
  描述：

  苯基苯甲酰重氮甲烷 以 二氯甲烷 为溶剂， 反应 14.5h， 生成 benzoin dimethyl ketal
  参考文献：
  名称：

  Vinylene 1,2-bis(trifluoromethanesulfonates) from azibenzils and triflic anhydride

  摘要：

  DOI：

  10.1021/jo00186a036

文献信息

• Novel ruthenium complexes bearing bipyridine-based and N-heterocyclic carbene-supported pyridine (NCN) ligands: the influence of ligands on catalytic transfer hydrogenation of ketones
  作者：Akkharadet Piyasaengthong、Luke J. Williams、Dmitry S. Yufit、James W. Walton

  DOI：10.1039/d1dt03240b

  日期：——

  Transfer hydrogenation (TH) is a powerful synthetic tool in the production of secondary alcohols from ketones by using a non-H2 hydrogen source along with metal catalysts. Among homogeneous catalysts, Ru(II) complexes are the most efficient catalysts. In our research, six novel ruthenium(II) complexes bearing bipyridine-based ligands [Ru(L1)Cl2] (1), [Ru(L1)(PPh3)Cl]Cl (2) and [Ru(L2)Cl2] (3) and N-heterocyclic

  转移氢化 (TH) 是通过使用非 H 2氢源和金属催化剂从酮生产仲醇的强大合成工具。在均相催化剂中，Ru( II )配合物是最有效的催化剂。在我们的研究中，六种新型钌 ( II ) 配合物带有联吡啶基配体 [Ru( L1 )Cl 2 ] ( 1 )、[Ru( L1 )(PPh 3 )Cl]Cl ( 2 ) 和 [Ru( L2 )Cl 2 ] ( 3 ) 和 N-杂环卡宾负载的吡啶 (NCN) 配体 [RuCp( L3 )]PF 6 (4 ), [RuCp*( L3 )]PF 6 ( 5 ), 和 [Ru( p -伞花烃)( L3 )Cl]PF 6 ( 6 ) (其中L1 = 6,6'-双(氨基甲基)-2,合成了 2'-联吡啶、L2 = 6,6'-双（二甲氨基甲基）-2,2'-联吡啶和L3 = 1,3-双（2-甲基吡啶基）溴化咪唑鎓）并通过 NMR 光谱、HRMS 和X 射线晶体学。在 KO
• Vitrifiable adhesive process
  申请人：DENTSPLY INTERNATIONAL INC.

  公开号：EP0067512A2

  公开（公告）日：1982-12-22

  Processes are provided for the adhering together of articles employing vitrifiable adhesives. According to a preferred embodiment, two or more articles (10, 12) are contacted with a polymerizable adhesive (24) comprising a particulate, inorganic filler and a polymerizable resin comprising at least 0.25% by weight of the adhesive of a polymerizable silane. The adhesive is then polymerized and the polymerized adhesive heated to afford a vitrified bond.

  本发明提供了使用可玻璃化粘合剂将物品粘合在一起的工艺。根据一个优选的实施方案，两个或两个以上的物品（10、12）与可聚合粘合剂（24）接触，该粘合剂由颗粒状无机填料和可聚合树脂组成，其中可聚合硅烷至少占粘合剂重量的 0.25%。然后对粘合剂进行聚合，并对聚合后的粘合剂进行加热，以产生玻璃化粘合。
• Demand set fixturing process
  申请人：DENTSPLY INTERNATIONAL, INC.

  公开号：EP0058513A2

  公开（公告）日：1982-08-25

  Demand set fixturing processes are provided for fixedly maintaining a preselected spatial orientation among a plurality of objects. According to a preferred embodiment, fixturing of a first object (18) relative to a second object (12) is accomplished by contacting said first and second objects (12, 18) with at least one portion of an actinic light polymerizable composition (24), positioning said objects (12, 18) relative to each other to attain a preselected spatial orientation and irradiating said portion with actinic light for a time sufficient to cause polymerization of said composition (24) thereby fixedly maintaining said preselected orientation.

  提供了在多个物体之间固定保持预选空间方位的按需套装固定工艺。 根据一个优选的实施方案，第一物体（18）相对于第二物体（12）的固定是通过以下方式完成的：将所述第一和第二物体（12、18）与至少一部分阳极光可聚合组合物（24）接触，将所述物体（12、18）彼此相对定位以达到预选空间方位，并用阳极光照射所述部分足够长的时间以导致所述组合物（24）聚合，从而固定保持所述预选方位。
• Radiation curable silaneous adhesives
  申请人：DENTSPLY INTERNATIONAL, INC.

  公开号：EP0058514A1

  公开（公告）日：1982-08-25

  Radiation curable silaneous adhesives are provided comprising a polymerizable resin comprising at least 20% by weight of a polymerizable silane and optionally up to about 80% by weight of a polymerizable, ethylenically unsaturated material. According to a preferred embodiment, the polymerizable silane is either an acrylosilane or a vinyl silane. Such adhesives may optionally be filled and may be used for the filling of dental cavities.

  辐射固化硅胶包括一种可聚合树脂，该树脂至少含有 20%（按重量计）的可聚合硅烷，以及高达约 80%（按重量计）的可聚合乙烯基不饱和材料。 根据一个优选的实施方案，可聚合硅烷是丙烯基硅烷或乙烯基硅烷。 此类粘合剂可选择进行填充，并可用于填充牙洞。
• Method for the preparation of symmetrical monoacetals of aromatic 1,2-diketones starting from the corresponding alphahydroxyketones
  申请人：FRATELLI LAMBERTI S.p.A.

  公开号：EP0085031A2

  公开（公告）日：1983-08-03

  The invention relates to a process for the production of symmetrical monoacetals of aromatic 1,2-diketones starting from the corresponding alphahydroxyketones and to their use as photoinitiators of polymerisation by ultraviolet radiations. According to the process of the invention, protection of the carbonyl group is not operated, and the aromatic alphahydroxyketones react, in the first step of the reaction, with an halogenating agent in presence of N-substituted aliphatic amide or an aliphatic alcohol from 1 to 5 atoms and, in the second step, with an alkaline metal alcoholate or an alcohol. If the carbonylic group is protected, the alphahydroxyketones are first converted into acetals or hydrazones and then into the products of the invention by means of oxidation or acetalisation.

  本发明涉及从相应的α-羟基酮开始生产芳香族 1,2-二酮的对称单乙醛的工艺，以及将其用作紫外线聚合的光引发剂。 根据本发明的工艺，不对羰基进行保护，在反应的第一步，芳香族α-羟基酮在 1 至 5 个原子的 N-取代脂肪族酰胺或脂肪族醇存在下与卤化剂反应，在第二步，与碱金属醇酸酯或醇反应。如果羰基受到保护，α-羟基酮首先转化为缩醛或酰肼，然后通过氧化或缩醛化反应转化为本发明的产品。