N-Boc-D-tert-leucine methyl ester | 153960-35-1

• 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: N-Boc-D-tert-leucine methyl ester
• 英文别名: D-N-Boc-t-leucine methyl ester；Boc-D-t-leucine；(R)-2-[(tert-Butyloxycarbonyl)amino]-3,3-dimethylbutanoic acid methyl ester；methyl (2R)-3,3-dimethyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoate
• CAS: 153960-35-1
• 化学式: C₁₂H₂₃NO₄
• 分子量: 245.319
• InChiKey: NDACBWZNPPVOJB-QMMMGPOBSA-N

物化性质

• 沸点：
  317.3±25.0 °C(Predicted)
• 密度：
  1.010±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  17
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  64.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  N-Boc-D-tert-leucine methyl ester 在 sodium hydroxide 作用下， 以 水 为溶剂， 生成 叔丁氧羰基-D-叔亮氨酸
  参考文献：
  名称：

  Enzymatic approach to both enantiomers of N-Boc hydrophobic amino acids

  摘要：

  Protease catalysed hydrolysis of N-Boc-amino acid esters allows us to obtain N-BOC L-acids and D-esters of amino butanoic acid, nor-leucine, nor-valine, leucine and t-leucine in excellent ee. The reaction occurs in short reaction times and high concentrations. When a biphasic system (buffer-MTBE) is employed, a strong solvent effect is observed. This method could be of significance for the preparation of D-t-leucine, for which a practical method is currently unavailable. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2006.07.012
• 作为产物：
  描述：

  BOC-D-叔亮氨醇 在 重铬酸吡啶 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 6.0h， 生成 N-Boc-D-tert-leucine methyl ester
  参考文献：
  名称：

  Chiral electrophilic “glycinal” equivalents. New synthons for optically active α-amino acids and 4-substituted 2-oxazolidinones

  摘要：

  The thermal reaction of 3-[(IS)-2-alkoxy-1-apocamphanecarbonyl]-2-oxazolones (21a-c) with dialkyl azodicarboxylates (9) results in exclusive formation of [4 + 2] type cycloadducts (22 and 23) with moderate levels of diastereofacial selection (up to 72% d.e.). The diastereomers thus obtained were readily purified and subsequent treatment with acidic methanol followed by removal of the auxiliary with LiBH4/MeOH (1:2) gave optically pure 4-methoxy-5-hydrazino-2-oxazolidinones (26 and 27), which serve as alpha-aminoaldehyde templates useful for the synthesis of a wide variety of optically active alpha-amino acids as well as 4-alkyl and 4-aryl-2-oxazolidinones. (C) 1997, Elsevier Science Ltd.

  DOI：

  10.1016/s0040-4020(96)01077-0

文献信息

• Lewis acid-mediated reaction with silyl ketene acetals and allylstannane of the aluminum acetals generated by DIBALH reduction of α-amino acid esters
  作者：Syun-ichi Kiyooka、Ken Suzuki、Masashi Shirouchi、Yuichi Kaneko、Shinji Tanimori

  DOI：10.1016/s0040-4039(00)73845-7

  日期：1993.9

  The intermediates generated by DIBALH reduction of α-amino acid esters undergo condensation without racemization with silyl ketene acetals and allylstannane in the presence of Lewis acid to afford the corresponding β-hydroxy esters and homoallylic alcohols in good yields while achieving high syn selectivity via an aluminum-assisted chelation control.

  在路易斯酸存在下，通过DIBALH还原α-氨基酸酯生成的中间体无需与硅烷基乙烯酮缩醛和烯丙基锡烷进行外消旋缩合，即可获得高收率的相应β-羟基酯和均烯丙醇，同时通过铝实现高同位选择性辅助的螯合控制。
• [EN] MACROCYCLES AS CFTR MODULATORS<br/>[FR] MACROCYCLES EN TANT QUE MODULATEURS DE CFTR
  申请人：IDORSIA PHARMACEUTICALS LTD

  公开号：WO2022194399A1

  公开（公告）日：2022-09-22

  The present invention relates to macrocyclic compounds of Formula (I) wherein Ar1, Ar2, R1, R2, R3, R4, and X are as described in the description, their preparation, to pharmaceutically acceptable salts thereof, and to their use as pharmaceuticals, to pharmaceutical compositions containing one or more compounds of Formula (I), and especially to their use as modulators of CFTR.

  本发明涉及公式（I）的大环化合物，其中Ar1，Ar2，R1，R2，R3，R4和X如描述中所述，它们的制备方法，其药学上可接受的盐以及它们作为药物的用途，包括含有一个或多个公式（I）化合物的药物组合物，特别是它们作为CFTR调节剂的用途。
• Asymmetric syntheses of (R)- and (S)-2-aminobutanesulfonic acid and their 3,3-dimethylderivatives
  作者：Daniela Braghiroli、Maria Di Bella

  DOI：10.1016/0957-4166(96)00257-1

  日期：1996.7

  (R)- and (S)-2-aminobutanesulfonic acid, 3a and 3b, and (R)- and (S)-2-amino-3,3-dimethylbutanesulfonic acid, 4a and 4b, were synthesized from the corresponding N-Boc protected beta-amino alcohols in good yields and high enantiomeric purities (>99% ee). Copyright (C) 1996 Elsevier Science Ltd
• Chiral electrophilic “glycinal” equivalents. New synthons for optically active α-amino acids and 4-substituted 2-oxazolidinones
  作者：Hirofumi Matsunaga、Tadao Ishizuka、Takehisa Kunieda

  DOI：10.1016/s0040-4020(96)01077-0

  日期：1997.1

  The thermal reaction of 3-[(IS)-2-alkoxy-1-apocamphanecarbonyl]-2-oxazolones (21a-c) with dialkyl azodicarboxylates (9) results in exclusive formation of [4 + 2] type cycloadducts (22 and 23) with moderate levels of diastereofacial selection (up to 72% d.e.). The diastereomers thus obtained were readily purified and subsequent treatment with acidic methanol followed by removal of the auxiliary with LiBH4/MeOH (1:2) gave optically pure 4-methoxy-5-hydrazino-2-oxazolidinones (26 and 27), which serve as alpha-aminoaldehyde templates useful for the synthesis of a wide variety of optically active alpha-amino acids as well as 4-alkyl and 4-aryl-2-oxazolidinones. (C) 1997, Elsevier Science Ltd.
• Enzymatic approach to both enantiomers of N-Boc hydrophobic amino acids
  作者：Eleonora Agosta、Antonio Caligiuri、Paola D’Arrigo、Stefano Servi、Davide Tessaro、Renato Canevotti

  DOI：10.1016/j.tetasy.2006.07.012

  日期：2006.8

  Protease catalysed hydrolysis of N-Boc-amino acid esters allows us to obtain N-BOC L-acids and D-esters of amino butanoic acid, nor-leucine, nor-valine, leucine and t-leucine in excellent ee. The reaction occurs in short reaction times and high concentrations. When a biphasic system (buffer-MTBE) is employed, a strong solvent effect is observed. This method could be of significance for the preparation of D-t-leucine, for which a practical method is currently unavailable. (c) 2006 Elsevier Ltd. All rights reserved.