Boc-Asp(OBzl)-1Nal-NH(CH3)2 | 145963-08-2

• 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: Boc-Asp(OBzl)-1Nal-NH(CH3)2
• 英文别名: Boc-Asp(OBzl)-Nal-N(CH3)2；Boc-Asp(OBn)-1Nal-NMe2；benzyl (3S)-4-[[(2S)-1-(dimethylamino)-3-naphthalen-1-yl-1-oxopropan-2-yl]amino]-3-[(2-methylpropan-2-yl)oxycarbonylamino]-4-oxobutanoate
• CAS: 145963-08-2
• 化学式: C₃₁H₃₇N₃O₆
• 分子量: 547.651
• InChiKey: XGXVMSWKABFEQG-UIOOFZCWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  40
• 可旋转键数：
  13
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  114
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  Boc-Asp(OBzl)-1Nal-NH(CH3)2 在 N-羟基丁二酰亚胺 、 三乙胺 、 N,N'-二环己基碳二亚胺 、 三氟乙酸 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 4.0h， 生成 Boc-Phg-Asp(OBzl)-1Nal-N(CH3)2
  参考文献：
  名称：

  CCK-B agonist or antagonist activities of structurally hindered and peptidase-resistant Boc-CCK4 derivatives

  摘要：

  Replacement of Met31 by (N-Me)Nle in CCK8 or CCK4 has been shown to improve the affinity and selectivity for CCK-B receptors. In order to obtain molecules with enhanced bioavailability, two novel series of protected tetrapeptides of the general formula Boc-Trp30-X-Asp-Y33 have been developed. Introduction of (N-Me)Nle and the bulky, aromatic naphthylalaninamide (Nal-NH2) in positions X and Y, respectively, does not greatly modify the affinity for guinea pig brain CCK-B receptors. In contrast, incorporation of hindering N-methyl amino acids such as (N-Me)Phe, (N-Me)Phg, or (N-Me)Chg, but not their non-methylated counterparts, in position X induced a large decrease in affinity for the CCK-B binding sites. Among the various peptides synthesized, Boc-[(N-Me)Nle31,1Nal-NH233]CCK4 (2) (K(I) = 2.8 nM), Boc-[Phg31,1Nal-NH233]CCK4 (15) (K(I) = 14 nM), and Boc-[Phg31,1Nal-N(CH3)233]CCK4 (17) (K(I) = 39 nM) displayed good affinities for brain CCK-B receptors and had good selectivity ratios. These pseudopeptides, in which the presence of unnatural and hydrophobic residues is expected to improve their penetration of the central nervous system, were shown to be very resistant to brain peptidases. Interestingly, whereas compounds 2 and 15 proved to be full agonists for rat hippocampal CCK-B receptors when measured in an electrophysiological assay, compound 17 behaved as a potent antagonist in the same test and displayed a good affinity in rat brain K(I)(CCK-B) = 51 nM as compared to the Merck antagonist L365,260, K(I)(CCK-B) = 12 nM. This illustrates a simple means to obtain CCK-B antagonists and suggests that the free, CONH2 group plays a critical role in the recognition of the agonist date of brain CCK-B receptors.

  DOI：

  10.1021/jm00053a022
• 作为产物：
  描述：

  Cbz-3-(1-萘)-l-ala 在 palladium on activated charcoal N-羟基丁二酰亚胺 、 氢气 、 三乙胺 、 N,N'-二环己基碳二亚胺 作用下， 以 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 生成 Boc-Asp(OBzl)-1Nal-NH(CH3)2
  参考文献：
  名称：

  CCK-B agonist or antagonist activities of structurally hindered and peptidase-resistant Boc-CCK4 derivatives

  摘要：

  Replacement of Met31 by (N-Me)Nle in CCK8 or CCK4 has been shown to improve the affinity and selectivity for CCK-B receptors. In order to obtain molecules with enhanced bioavailability, two novel series of protected tetrapeptides of the general formula Boc-Trp30-X-Asp-Y33 have been developed. Introduction of (N-Me)Nle and the bulky, aromatic naphthylalaninamide (Nal-NH2) in positions X and Y, respectively, does not greatly modify the affinity for guinea pig brain CCK-B receptors. In contrast, incorporation of hindering N-methyl amino acids such as (N-Me)Phe, (N-Me)Phg, or (N-Me)Chg, but not their non-methylated counterparts, in position X induced a large decrease in affinity for the CCK-B binding sites. Among the various peptides synthesized, Boc-[(N-Me)Nle31,1Nal-NH233]CCK4 (2) (K(I) = 2.8 nM), Boc-[Phg31,1Nal-NH233]CCK4 (15) (K(I) = 14 nM), and Boc-[Phg31,1Nal-N(CH3)233]CCK4 (17) (K(I) = 39 nM) displayed good affinities for brain CCK-B receptors and had good selectivity ratios. These pseudopeptides, in which the presence of unnatural and hydrophobic residues is expected to improve their penetration of the central nervous system, were shown to be very resistant to brain peptidases. Interestingly, whereas compounds 2 and 15 proved to be full agonists for rat hippocampal CCK-B receptors when measured in an electrophysiological assay, compound 17 behaved as a potent antagonist in the same test and displayed a good affinity in rat brain K(I)(CCK-B) = 51 nM as compared to the Merck antagonist L365,260, K(I)(CCK-B) = 12 nM. This illustrates a simple means to obtain CCK-B antagonists and suggests that the free, CONH2 group plays a critical role in the recognition of the agonist date of brain CCK-B receptors.

  DOI：

  10.1021/jm00053a022

文献信息

• Role of N- and C-terminal substituents on the CCK-B agonist-antagonist pharmacological profile of Boc-Trp-Phg-Asp-Nal-NH2 derivatives
  作者：Jian Hui Weng、Armand G.S. Blommaert、Laurent Moizo、André Bado、Bertrand Ducos、Andreas Böhme、Christiane Garbay、Bernard P. Roques

  DOI：10.1016/0968-0896(96)00050-8

  日期：1996.4

  Introduction of more bulky substituents than NalNH2 on the C-terminal part decreased the CCK-B receptor binding affinity. In the series of N-protected tetrapeptides X30-Phg31-Asp32-Nal33-N(CH3)2, the Boc-substituent was shown to be optimal among the N-protecting groups Boc, 2Adoc, propionyl or acetyl when X = Trp. On the other hand, when X = alpha MeTrp, its optimal N-protecting group was 2Adoc and its configuration

  在CCK衍生物中，四肽Boc-Trp-Phg-Asp-Nal-NH2（1）表现为短效的CCK-B激动剂，可通过其末端的二甲基化开发出一种有效的抗肽酶的CCK-B拮抗剂。 CONH2组。已经进行了N端和C端部分1的进一步修饰，并在本文中进行了描述，以及新型合成化合物的药理特性。在C末端部分引入比NalNH 2更多的大体积取代基降低了CCK-B受体结合亲和力。在一系列N-保护的四肽X30-Phg31-Asp32-Nal33-N（CH3）2中，当X = Trp时，Boc取代基在N-保护基团Boc，2Adoc，丙酰基或乙酰基中显示最佳。另一方面，当X = alpha MeTrp时，其最佳的N保护基为2Adoc，其构型优先为D。在新合成的化合物中，13：2Adoc-D-alpha MeTrp-Phg-Asp-NalN（ ）2和16：2Adoc-D-alpha MeTrp-Phg -Asp-Nal