tert-butyl N-[3-[tert-butyl(dimethyl)silyl]oxypropyl]-N-(cyanomethyl)carbamate | 1236062-60-4

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: tert-butyl N-[3-[tert-butyl(dimethyl)silyl]oxypropyl]-N-(cyanomethyl)carbamate
• CAS: 1236062-60-4
• 化学式: C₁₆H₃₂N₂O₃Si
• 分子量: 328.527
• InChiKey: LZGCIBKQYTYTLM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.16
• 重原子数：
  22
• 可旋转键数：
  9
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.88
• 拓扑面积：
  62.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  tert-butyl N-[3-[tert-butyl(dimethyl)silyl]oxypropyl]-N-(cyanomethyl)carbamate 在 N-甲基咪唑 、 N,N-二甲基丙烯基脲 、 四丁基氟化铵 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 为溶剂， 生成 tert-butyl (1-cyanocyclopentyl)(3-((diethoxyphosphoryl)oxy)propyl)carbamate
  参考文献：
  名称：

  Trianion Synthon 方法对螺环杂环

  摘要：

  利用α-杂原子腈作为三阴离子合成子，通过双烷基化和还原环化方法构建了多种螺环杂环。该方法提供了获得各种环大小的杂原子取代螺环的途径，这些环大小在天然产物中发现并且在药物先导开发和优化中很重要。

  DOI：

  10.1021/ol400788q
• 作为产物：
  描述：

  [3-(tert-butyldimethylsiloxy)propylamino]acetonitrile 、 二碳酸二叔丁酯 反应 12.0h， 以80%的产率得到tert-butyl N-[3-[tert-butyl(dimethyl)silyl]oxypropyl]-N-(cyanomethyl)carbamate
  参考文献：
  名称：

  Fully Substituted Carbon Centers by Diastereoselective Spirocyclization: Stereoselective Synthesis of (+)-Lepadiformine C

  摘要：

  Reductive lithiation of N-Boc alpha-amino nitriles generated alpha-amino alkyllithium reagents with unexpected selectivity. The intermediate radical prefers to align with the nitrogen lone pair, and this interaction leads to an A(1,3)-strain effect that biases the conformation of the radical. In cyclohexane rings with alpha-substituents the net effect is an inversion of configuration on reductive lithiation. In the presence of a tethered electrophile the alkyllithium cyclizes to produce a spiro compound, again with inversion of configuration. The overall result is retention of configuration in the cyclization reaction. The same overall selectivity is found with alpha-oxygen alkyllithium cyclizations, but in this case both steps proceed with retention. The difference can be explained by careful consideration of the intermediate geometries. The alpha-amino spirocyclization was utilized in a concise and stereoselective synthesis of lepadiformine C.

  DOI：

  10.1021/ja104250b

文献信息

• Total Synthesis of Lepadiformine Alkaloids using <i>N</i>-Boc α-Amino Nitriles as Trianion Synthons
  作者：Matthew A. Perry、Matthew D. Morin、Brian W. Slafer、Scott D. Rychnovsky

  DOI：10.1021/jo300161x

  日期：2012.4.6

  synthesized in an enantiomerically pure form using a reductive cyclization strategy. N-Boc α-amino nitriles were deprotonated and alkylated with enantiomerically pure dibromides to afford the first ring. The products were manipulated to introduce phosphate leaving groups, and subsequent reductive lithiation followed by intramolecular alkylation formed the second ring with high stereoselectivity. The third

  Lepadiformine A、B 和 C 是使用还原环化策略以对映体纯形式合成的。N -Boc α-氨基腈被去质子化并用对映体纯二溴化物烷基化以提供第一个环。操纵产物以引入磷酸盐离去基团，随后的还原锂化和分子内烷基化形成具有高立体选择性的第二个环。第三个环是通过去保护的胺分子内置换甲磺酸盐形成的。Lepadiformine A 和 B 含有一个与胺相邻的羟甲基。使用 Polonovski-Potier 反应作为关键步骤，按顺序引入该附属物。合成策略具有立体选择性和收敛性，并证明了N的效用-Boc α-氨基腈作为生物碱合成的关键。
• Stereochemical Outcomes in Reductive Cyclizations To Form Spirocyclic Heterocycles
  作者：Matthew A. Perry、Richard R. Hill、Justin J. Leong、Scott D. Rychnovsky

  DOI：10.1021/acs.orglett.5b01422

  日期：2015.7.2

  Reductive lithiation and cyclization of N-Boc α-amino nitriles are often highly stereoselective. The alkyllithium intermediates are formed with varying levels of selectivity, but the alkyllithium geometry does not play a major role in the overall stereoselectivity. The final configuration is determined in the cyclization reaction, where both retention and inversion pathways are observed. Where strong

  N -Bocα-氨基腈的还原锂化和环化通常具有很高的立体选择性。形成的烷基锂中间体具有不同的选择性水平，但烷基锂的几何形状在总体立体选择性中不发挥主要作用。最终构型是在环化反应中确定的，在该反应中观察到了保留和转化途径。在产物中存在强烈的热力学偏好的地方，动力学控制的烷基锂环化有利于更稳定的产物。
• Trianion Synthon Approach to Spirocyclic Heterocycles
  作者：Matthew A. Perry、Richard R. Hill、Scott D. Rychnovsky

  DOI：10.1021/ol400788q

  日期：2013.5.3

  A variety of spirocyclic heterocycles have been constructed by a double-alkylation and reductive cyclization approach utilizing α-heteroatom nitriles as trianion synthons. The method provides access to heteroatom-substituted spirocycles in a variety of ring sizes that are found in natural products and are important in pharmaceutical lead development and optimization.

  利用α-杂原子腈作为三阴离子合成子，通过双烷基化和还原环化方法构建了多种螺环杂环。该方法提供了获得各种环大小的杂原子取代螺环的途径，这些环大小在天然产物中发现并且在药物先导开发和优化中很重要。
• Fully Substituted Carbon Centers by Diastereoselective Spirocyclization: Stereoselective Synthesis of (+)-Lepadiformine C
  作者：Matthew A. Perry、Matthew D. Morin、Brian W. Slafer、Scott A. Wolckenhauer、Scott D. Rychnovsky

  DOI：10.1021/ja104250b

  日期：2010.7.21

  Reductive lithiation of N-Boc alpha-amino nitriles generated alpha-amino alkyllithium reagents with unexpected selectivity. The intermediate radical prefers to align with the nitrogen lone pair, and this interaction leads to an A(1,3)-strain effect that biases the conformation of the radical. In cyclohexane rings with alpha-substituents the net effect is an inversion of configuration on reductive lithiation. In the presence of a tethered electrophile the alkyllithium cyclizes to produce a spiro compound, again with inversion of configuration. The overall result is retention of configuration in the cyclization reaction. The same overall selectivity is found with alpha-oxygen alkyllithium cyclizations, but in this case both steps proceed with retention. The difference can be explained by careful consideration of the intermediate geometries. The alpha-amino spirocyclization was utilized in a concise and stereoselective synthesis of lepadiformine C.