Bsmoc-Leu-F | 197245-49-1

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: Bsmoc-Leu-F
• 英文别名: (1,1-dioxo-1-benzothiophen-2-yl)methyl N-[(2S)-1-fluoro-4-methyl-1-oxopentan-2-yl]carbamate
• CAS: 197245-49-1
• 化学式: C₁₆H₁₈FNO₅S
• 分子量: 355.387
• InChiKey: ZUQPGDVVWPBCHT-ZDUSSCGKSA-N

物化性质

• 沸点：
  557.5±50.0 °C(Predicted)
• 密度：
  1.323±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  24
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  97.9
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  L-苯丙氨酸叔丁酯盐酸盐 、 Bsmoc-Leu-F 在 N,N-二异丙基乙胺 、 三氟乙酸 作用下， 生成 Bsmoc-Leu-Phe-OH
  参考文献：
  名称：

  The 1,1-Dioxobenzo[b]thiophene-2-ylmethyloxycarbonyl (Bsmoc) Amino-Protecting Group

  摘要：

  Full details are presented for use of the Bsmoc amino-protecting group for both solid phase and rapid continuous solution syntheses. Application to the latter methodology represents a significant improvement over the corresponding Fmoc-based method for rapid solution synthesis due to the opportunity to use water or saturated sodium-chloride solution rather than an acidic phosphate buffer to remove all byproducts, with consequent cleaner phase separation and higher yields of the growing peptide. Comparison of the Bsmoc and Bspoc functions showed that the former, because of steric hindrance, does not suffer from the competitive or premature deblocking observed with the Bspoc system. Because of its incorporation of a styrene chromophore, resin loading of Bsmoc amino acids could be followed as has previously been shown for the Fmoc analogues. Applications of Bsmoc chemistry to peptide sequences incorporating the base sensitive Asp-Gly unit gave less contamination due to aminosuccinimide formation than comparable syntheses involving standard Fmoc chemistry because a weaker or less concentrated base could be used in the deblocking step. Experimental details are presented for building up peptides in solution via the continuous methodology. Deblockings involved the use of insoluble piperazino silica as well as the polyamine TAEA which simplified aqueous separation of the growing, but nonisolated peptide product, from excess acylating agent and other side products formed in the deblocking process. By the appropriate choice of base, one can act selectively at either site of a molecule which incorporates both beta-elimination and Michael acceptor sites as protective units (Bsmoc vs Fm and Fmoc vs Bsm).

  DOI：

  10.1021/jo982140l
• 作为产物：
  描述：

  benzothiophen-2-yllithium 在 吡啶 、 sodium perborate 、 sodium tetrahydroborate 、 三甲基氯硅烷 、 三聚氟氰 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 、 溶剂黄146 为溶剂， 反应 3.5h， 生成 Bsmoc-Leu-F
  参考文献：
  名称：

  The 1,1-Dioxobenzo[b]thiophene-2-ylmethyloxycarbonyl (Bsmoc) Amino-Protecting Group

  摘要：

  Full details are presented for use of the Bsmoc amino-protecting group for both solid phase and rapid continuous solution syntheses. Application to the latter methodology represents a significant improvement over the corresponding Fmoc-based method for rapid solution synthesis due to the opportunity to use water or saturated sodium-chloride solution rather than an acidic phosphate buffer to remove all byproducts, with consequent cleaner phase separation and higher yields of the growing peptide. Comparison of the Bsmoc and Bspoc functions showed that the former, because of steric hindrance, does not suffer from the competitive or premature deblocking observed with the Bspoc system. Because of its incorporation of a styrene chromophore, resin loading of Bsmoc amino acids could be followed as has previously been shown for the Fmoc analogues. Applications of Bsmoc chemistry to peptide sequences incorporating the base sensitive Asp-Gly unit gave less contamination due to aminosuccinimide formation than comparable syntheses involving standard Fmoc chemistry because a weaker or less concentrated base could be used in the deblocking step. Experimental details are presented for building up peptides in solution via the continuous methodology. Deblockings involved the use of insoluble piperazino silica as well as the polyamine TAEA which simplified aqueous separation of the growing, but nonisolated peptide product, from excess acylating agent and other side products formed in the deblocking process. By the appropriate choice of base, one can act selectively at either site of a molecule which incorporates both beta-elimination and Michael acceptor sites as protective units (Bsmoc vs Fm and Fmoc vs Bsm).

  DOI：

  10.1021/jo982140l

文献信息

• Rapid, Continuous Solution-Phase Peptide Synthesis:  Application to Peptides of Pharmaceutical Interest
  作者：Louis A. Carpino、Shahnaz Ghassemi、Dumitru Ionescu、Mohamed Ismail、Dean Sadat-Aalaee、George A. Truran、E. M. E. Mansour、Gary A. Siwruk、John S. Eynon、Barry Morgan

  DOI：10.1021/op0202179

  日期：2003.1.1

  The Fmoc/TAEA and Bsmoc/TAEA methods for the rapid, continuous solution synthesis of peptide segments are shown to be applicable to the gram-scale synthesis of short peptides as well as, for the first time, to the synthesis of a relatively long (22-mer) segment, (hPTH 13-34). In the latter case the crude product was of significantly greater purity than a sample obtained via a solid-phase protocol. The Bsmoc methodology was optimized by a new technique involving filtration of the growing partially deprotected peptide at each coupling-deprotection cycle through a short column of silica gel.