(E)-tert-butyl 4-methylbenzylidenecarbamate | 743430-45-7

• 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: (E)-tert-butyl 4-methylbenzylidenecarbamate
• 英文别名: tert-butyl (E)-(4-methylbenzylidene)carbamate；p-tolualdehyde N-(tert-butoxycarbonyl)imine；tert-butyl 4-(methyl)benzylidenecarbamate；tert-butyl (NE)-N-[(4-methylphenyl)methylidene]carbamate
• CAS: 743430-45-7
• 化学式: C₁₃H₁₇NO₂
• 分子量: 219.283
• InChiKey: YPMZMZVHKHOHPH-NTEUORMPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  16
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  38.7
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (E)-tert-butyl 4-methylbenzylidenecarbamate 在 chiral Cu-catalyst sodium tetrahydroborate 、 4-叔丁基苯酚 、 samarium(III) isopropoxide 、 nickel dichloride 作用下， 以 四氢呋喃 、 甲醇 为溶剂， 反应 55.25h， 生成
  参考文献：
  名称：

  syn-Selective Catalytic Asymmetric Nitro-Mannich Reactions Using a Heterobimetallic Cu−Sm−Schiff Base Complex

  摘要：

  syn-Selective catalytic asymmetric nitro-Mannich reactions using a heterobimetallic Cu/Sm/Schiff base complex are described. The present method is complementary to the previously reported methods, and products were obtained in high syn-selectivity (> 20:1), yield (99-62%), and enantioselectivity (98-83% ee). Both Cu and Sm metals, aligned suitably in a dinucleating Schiff base ligand, were essential to realize high synselectivity.

  DOI：

  10.1021/ja0701560
• 作为产物：
  描述：

  tert-butyl (phenylsulfonyl(p-tolyl)methyl)carbamate 在 水 、 potassium carbonate 作用下， 以 二氯甲烷 为溶剂， 反应 5.0h， 生成 (E)-tert-butyl 4-methylbenzylidenecarbamate
  参考文献：
  名称：

  Chiral ureas and thioureas supported on polystyrene for enantioselective aza-Henry reactions under solvent-free conditions

  摘要：

  手性可回收支持的双功能脲或硫脲在无溶剂条件下促进高对映选择性的无溶剂条件下的氮杂-Henry反应。

  DOI：

  10.1039/c4gc02474e

文献信息

• Asymmetric Catalytic Mannich Reactions Catalyzed by Urea Derivatives:  Enantioselective Synthesis of <i>β</i>-Aryl-<i>β</i>-Amino Acids
  作者：Anna G. Wenzel、Eric N. Jacobsen

  DOI：10.1021/ja028353g

  日期：2002.11.1

  Highly enantioselective addition reactions between silyl ketene acetals and N-Boc aldimines are catalyzed by the thiourea-based catalyst 1c. Extraordinary scope is observed in this methodology with regard to the imine substrate, with aryl and heteroaromatic derivatives generally affording nearly quantitative yields of β-amino ester product in up to 98% enantioselectivity.

  甲硅烷基乙烯酮缩醛和 N-Boc 醛亚胺之间的高度对映选择性加成反应由硫脲基催化剂 1c 催化。这种方法在亚胺底物方面观察到了非凡的范围，芳基和杂芳族衍生物通常以高达 98% 的对映选择性提供几乎定量的 β-氨基酯产物产率。
• A Three-Component Reaction for the One-Pot Preparation of β-Amino-α,α-Difluoroketones from Trimethyl(trifluoromethyl)silane (CF3TMS), Acylsilanes and Imines
  作者：Aurélien Honraedt、Lucía Méndez、Jean-Marc Campagne、Eric Leclerc

  DOI：10.1055/s-0036-1588447

  日期：2017.9

  the acylsilane compared to the imine allows the direct mixing of all the reagents in a three-component, one-pot process. A methodology allowing the direct preparation of β-amino-α,α-difluoroketones from the Ruppert–Prakash reagent (CF3TMS), acyltrimethylsilanes and N-Boc or N-(diphenylphosphinyl)imines is reported. The process, initiated by a catalytic amount of tetra-n-butylammonium difluorotriphenylsilicate

  摘要 甲方法论允许β氨基-α，α-difluoroketones从鲁珀特-普拉卡什试剂（CF直接制备3 TMS），acyltrimethylsilanes和Ñ -Boc或ñ - （二苯基膦基）亚胺进行报告。该方法由催化量的二氟三苯基硅酸四正丁基铵（TBAT）引发，涉及在酰基硅烷中添加CF 3 TMS，然后进行布鲁克重排并消除氟离子。后者促进将所得的二氟烯氧基硅烷添加到亚胺中。与亚胺相比，酰基硅烷具有更高的亲电子性，可以在三组分一锅法中直接混合所有试剂。 甲方法论允许β氨基-α，α-difluoroketones从鲁珀特-普拉卡什试剂（CF直接制备3 TMS），acyltrimethylsilanes和Ñ -Boc或ñ - （二苯基膦基）亚胺进行报告。该方法由催化量的二氟三苯基硅酸四正丁基铵（TBAT）引发，涉及在酰基硅烷中添加CF 3 TMS，然后进行布鲁克重排并消除氟离子。后者促进将所得
• The Mannich Reaction of Malonates with Simple Imines Catalyzed by Bifunctional Cinchona Alkaloids:  Enantioselective Synthesis of β-Amino Acids
  作者：Jun Song、Yi Wang、Li Deng

  DOI：10.1021/ja060716f

  日期：2006.5.1

  efficient, direct asymmetric Mannich reactions with malonates and N-Boc aryl and alkyl imines by cooperative hydrogen-bonding catalysis with a cinchona alkaloid bearing a thiourea functionality. We have also extended the scope of this reaction to beta-ketoesters. The synthetic value of this new reaction is demonstrated in the establishment of a convergent enantioselective route toward the biologically

  我们描述了通过与带有硫脲官能团的金鸡纳生物碱的协同氢键催化作用，与丙二酸酯和 N-Boc 芳基和烷基亚胺进行的第一个有效、直接的不对称曼尼希反应。我们还将该反应的范围扩展到 β-酮酯。这种新反应的合成价值通过在温和、耐空气和耐湿条件下建立针对生物学上重要的β-氨基酸的聚合对映选择性路线得到了证明。
• Direct Catalytic Asymmetric Mannich-type Reaction of Hydroxyketone Using a Et₂Zn/Linked-BINOL Complex:  Synthesis of Either <i>a</i><i>nti</i>- or <i>s</i><i>yn</i>-β-Amino Alcohols
  作者：Shigeki Matsunaga、Takamasa Yoshida、Hiroyuki Morimoto、Naoya Kumagai、Masakatsu Shibasaki

  DOI：10.1021/ja0482435

  日期：2004.7.1

  Full details of a direct catalytic asymmetric Mannich-type reaction of a hydroxyketone using a Et2Zn/(S,S)-linked-BINOL complex are described. By choosing the proper protective groups on imine nitrogen, either anti- or syn-beta-amino alcohol was obtained in good diastereomeric ratio, yield, and excellent enantiomeric excess using the same zinc catalysis. N-Diphenylphosphinoyl (Dpp) imine 3 gave anti-beta-amino

  描述了使用 Et2Zn/(S,S) 连接的 BINOL 复合物对羟基酮进行直接催化不对称曼尼希型反应的全部细节。通过在亚胺氮上选择适当的保护基团，使用相同的锌催化，可以以良好的非对映体比例、产率和优异的对映体过量获得反-或顺-β-氨基醇。N-二苯基膦酰基 (Dpp) 亚胺 3 以 anti/syn = 高达 >98/2、高达 >99% 的收率和高达 >99.5% 的 ee 得到抗 β-氨基醇，而 Boc-亚胺 4 得到了合成- anti/syn 中的 β-氨基醇 = 高达 5/95，高达 >99% 的产率和高达 >99.5% 的 ee。高催化剂周转数 (TON) 也值得注意。对于反选择性反应，催化剂负载成功地减少到 0.02 mol %（TON = 高达 4920），对于顺选择性反应，催化剂负载减少到 0.05 mol %（TON = 高达 1760）。Et2Zn/(S,S)-linked-BINOL
• The Amino Thiourea-Catalyzed Asymmetric Nucleophilic Reactions
  作者：Yoshiji Takemoto、Hideto Miyabe

  DOI：10.2533/chimia.2007.269

  日期：——

  Bifunctional amino thiourea-catalyzed asymmetric additions of several nucleophiles into electron-deficient unsaturated compounds such as nitroolefins, ?,?-unsaturated imides, imines, and azodicarboxylates are described. We discovered that bifunctional thioureas bearing a tertiary amino group significantly accelerated several nucleophilic addition reactions of active methylene compounds to electron-deficient double bonds. In these reactions, a strong hydrogen-bonding ability of the thiourea moiety as well as an appropriate Brønsted basicity of the tertiary amine is crucial for high enantioselectivity. This dual activation of both nucleophiles and electrophiles by the bifunctional thiourea expanded the applicability of the thiourea-catalyzed enantioselective reaction. In addition, these organocatalyzed asymmetric reactions were successfully applied to the concise asymmetric synthesis of natural products and medicinal candidates such as epibatidine, baclofen, and CP-99,994.

  双功能氨基硫脲催化的不对称加成反应将几种亲核试剂加入到电子不足的不饱和化合物中，如硝基烯烃、α，β-不饱和亚酰胺、亚胺和叠氮二羧酸酯。我们发现，含有三级胺基的双功能硫脲显著加速了活性亚甲基化合物与电子不足双键的几种亲核加成反应。在这些反应中，硫脲基团的强氢键能力以及三级胺的适当Brønsted碱性对高对映选择性至关重要。双功能硫脲对亲核试剂和电子亲电试剂的双重活化扩展了硫脲催化的不对称反应的适用范围。此外，这些有机催化的不对称反应成功应用于天然产物和药用候选化合物的简洁不对称合成，如蛙毒碱、氯硝西泮和CP-99,994。