ethyl 2-((tert-butyldiphenylsilyl)oxy)propanoate | 130050-88-3

• 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: ethyl 2-((tert-butyldiphenylsilyl)oxy)propanoate
• 英文别名: Ethyl 2-[tert-butyl(diphenyl)silyl]oxypropanoate
• CAS: 130050-88-3
• 化学式: C₂₁H₂₈O₃Si
• 分子量: 356.537
• InChiKey: YASBFNGFMQZSHV-UHFFFAOYSA-N

物化性质

• 沸点：
  396.6±34.0 °C(predicted)
• 密度：
  1.03±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.51
• 重原子数：
  25
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  ethyl 2-((tert-butyldiphenylsilyl)oxy)propanoate 在 二异丁基氢化铝 作用下， 以 甲苯 为溶剂， 反应 1.58h， 生成 2-[[(1,1-dimethylethyl)diphenylsilyl]oxy]propanal
  参考文献：
  名称：

  Highly Diastereoselective Conjugate Addition of Lithium Dialkylamides to α,β-Unsaturated Esters Having a Chiral Center at the γ-Position

  摘要：

  The conjugate addition of lithium amides 2 to tert-butyl 4-(OR)-substituted-2-pentenoates 1 produced a mixture of the syn-and anti-amino esters (3 and 4) in high yields. Sterically bulky OR groups, such as trityloxy and tert-butyldiphenylsilyloxy, gave the syn diastereomer 3 either exclusively or predominantly. The syn-selectivity may be explained by a modified Felkin-Anh model. The use of tert-butyldimethylsilyloxy as an OR group afforded a nearly 1:1 mixture of diastereoisomers, and the use of the smallest MeO group produced a 63:37 mixture of the syn 3 and anti isomer 4. The presence of Me group at the alpha-position (C-2 position) of the enoate enhanced the syn diastereoselectivity up to 100%; the conjugate addition to tert-butyl 4-methoxy-2-methyl-2-pentenoate (17) gave the syn-isomer 18 exclusively. This enhancement may be explained by the combination of chelation and allylic strain model 19 in which the smallest H orients inside to avoid an allylic strain. A phenyl group at the gamma-position enhanced the anti selectivity in the case of gamma-alkoxy-alpha,beta-enoates such as isopropyl 4-[(tert-butyldimethylsilyl)oxy]-4-phenyl-2-buteonoate (20), and in the case of gamma-alkyl-alpha,beta-enoates such as tert-butyl 4-phenyl-2-pentenoate (27).

  DOI：

  10.1021/jo970435d
• 作为产物：
  描述：

  乳酸乙酯 、 叔丁基二苯基氯硅烷 在 咪唑 作用下， 以 四氢呋喃 为溶剂， 反应 18.0h， 生成 ethyl 2-((tert-butyldiphenylsilyl)oxy)propanoate
  参考文献：
  名称：

  [EN] INHIBITORS OF HISTONE DEACETYLASE USEFUL FOR THE TREATMENT OR PREVENTION OF HIV INFECTION
  [FR] INHIBITEURS DE DÉSACÉTYLASE D'HISTONE UTILES POUR TRAITER OU PRÉVENIR UNE INFECTION PAR LE VIH

  摘要：

  公开号：

  WO2020096916A3

文献信息

• Electrochemical Synthesis of 2-Bromoethyl and 2-Iodoethyl Ketones from Cyclopropanols
  作者：Alaksiej L. Hurski、Maryia V. Barysevich、Yauhen M. Aniskevich

  DOI：10.1055/a-1650-8519

  日期：2021.12

  been developed. The reaction proceeded with exclusive regioselectivity and without epimerization of the α-stereocenter in the products. We also showed that the synthesized diastereomerically pure 2-bromoethyl ketones undergo smooth copper and nickel-catalyzed alkylation, alkenylation, and arylations reactions.

  已开发出一种用于从环丙醇和卤化镁制备 2-溴乙基和 2-碘乙基酮的简单电化学方案。反应以独特的区域选择性进行，产物中没有α-立体中心的差向异构化。我们还表明合成的非对映异构纯 2-溴乙基酮经历了顺利的铜和镍催化的烷基化、烯基化和芳基化反应。
• [EN] INHIBITORS OF HISTONE DEACETYLASE USEFUL FOR THE TREATMENT OR PREVENTION OF HIV INFECTION<br/>[FR] INHIBITEURS DE DÉSACÉTYLASE D'HISTONE UTILES POUR TRAITER OU PRÉVENIR UNE INFECTION PAR LE VIH
  申请人：MERCK SHARP & DOHME

  公开号：WO2020096916A3

  公开（公告）日：2020-08-13
• Highly Diastereoselective Conjugate Addition of Lithium Dialkylamides to α,β-Unsaturated Esters Having a Chiral Center at the γ-Position
  作者：Naoki Asao、Takashi Shimada、Tomoko Sudo、Naofumi Tsukada、Kazuhiko Yazawa、Young Soo Gyoung、Tadao Uyehara、Yoshinori Yamamoto

  DOI：10.1021/jo970435d

  日期：1997.9.1

  The conjugate addition of lithium amides 2 to tert-butyl 4-(OR)-substituted-2-pentenoates 1 produced a mixture of the syn-and anti-amino esters (3 and 4) in high yields. Sterically bulky OR groups, such as trityloxy and tert-butyldiphenylsilyloxy, gave the syn diastereomer 3 either exclusively or predominantly. The syn-selectivity may be explained by a modified Felkin-Anh model. The use of tert-butyldimethylsilyloxy as an OR group afforded a nearly 1:1 mixture of diastereoisomers, and the use of the smallest MeO group produced a 63:37 mixture of the syn 3 and anti isomer 4. The presence of Me group at the alpha-position (C-2 position) of the enoate enhanced the syn diastereoselectivity up to 100%; the conjugate addition to tert-butyl 4-methoxy-2-methyl-2-pentenoate (17) gave the syn-isomer 18 exclusively. This enhancement may be explained by the combination of chelation and allylic strain model 19 in which the smallest H orients inside to avoid an allylic strain. A phenyl group at the gamma-position enhanced the anti selectivity in the case of gamma-alkoxy-alpha,beta-enoates such as isopropyl 4-[(tert-butyldimethylsilyl)oxy]-4-phenyl-2-buteonoate (20), and in the case of gamma-alkyl-alpha,beta-enoates such as tert-butyl 4-phenyl-2-pentenoate (27).