6-amino-4-chloro-2-methyl-2H-pyrazolo<3,4-d>pyrimidine

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡唑并嘧啶类
• 英文名称: 6-amino-4-chloro-2-methyl-2H-pyrazolo<3,4-d>pyrimidine
• 英文别名: 4-chloro-2-methyl-2H-pyrazolo[3,4-d]pyrimidin-6-amine；6-amino-4-chloro-2-methyl-2H-pyrazolo[3,4-d]pyrimidine；4-Chloro-2-methylpyrazolo[3,4-d]pyrimidin-6-amine
• 化学式: C₆H₆ClN₅
• 分子量: 183.6
• InChiKey: RXEQCUCTYQMCHP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.8
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  69.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  6-amino-4-chloro-2-methyl-2H-pyrazolo<3,4-d>pyrimidine 在 硫酸 、 双氧水 、 potassium carbonate 、 sodium 4-methylbenzenesulfinate 、 N,N-二异丙基乙胺 作用下， 以 二甲基亚砜 、 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 39.0h， 生成 ethyl 6-benzamido-2-methyl-2H-pyrazolo[3,4-d]pyrimidine-4-carboxylate
  参考文献：
  名称：

  A facile and novel synthesis of N2-, C6-substituted pyrazolo[3,4-d]pyrimidine-4 carboxylate derivatives as adenosine receptor antagonists

  摘要：

  An efficient synthetic procedure was adopted to synthesize a series of new molecules containing the pyrazolo[3,4-d]pyrimidine (PP) scaffold, which have been evaluated as promising human adenosine receptor (AR) antagonists. The effect of substitutions at the N-2, C-4 and C-6 positions of PPs on the affinity and selectivity towards the adenosine receptors were explored. Most of the pyrazolo[3,4-d]pyrimidine-4-carboxylates displayed from moderate to good affinity at the human A(3)AR (hA(3)AR), as indicated by the low micromolar range of K-i values (K-i hA(3)AR = 0.7-34 mu M). In particular, compounds 60 and 62 displayed good affinity at the hA(3)AR (60, K-i hA(3)AR = 2.2 mu M and 62, K-i hA(3)AR = 2.9 mu M) and selectivity towards the other AR subtypes (60, >46-fold selective and 62, >34-fold selective, respectively). In view of these results, these novel PP analogues were docked both in the crystallographic structure of the hA(2A)AR and in a homology model of the hA(3)AR in order to support the structure activity relationship (SAR) analysis. These preliminary results demonstrated that pyrazolo[3,4-d]pyrimidine can be considered a promising scaffold to obtain new molecules with potent hA(3)AR antagonist activity. (C) 2015 Elsevier Masson SAS. All rights reserved.

  DOI：

  10.1016/j.ejmech.2015.01.046
• 作为产物：
  描述：

  6-amino-2-methyl-2H-pyrazolo[3,4-d]pyrimidin-4(5H)-one 在 二甲胺 、 三氯化磷 作用下， 反应 24.0h， 以65%的产率得到6-amino-4-chloro-2-methyl-2H-pyrazolo<3,4-d>pyrimidine
  参考文献：
  名称：

  发现简化的N 2取代的吡唑并[3,4- d ]嘧啶衍生物作为新型腺苷受体拮抗剂：有效的合成方法，生物学评估和分子对接研究

  摘要：

  在本研究中，采用了这样的分子的简化的方法来设计新的双环吡唑并[3,4- d ]从三环吡唑并嘧啶（PP）衍生物[4,3- ë ] -1,2,4-三唑并[1， 5- c ]嘧啶（PTP）作为有前途的人类A 3腺苷受体（hA 3 AR）拮抗剂。使用新颖有效的合成方案合成了所有目标化合物，并且通过合成一系列具有各种取代基的PTP类似物，探索了这些PP的结构-活性关系研究。在N 2处引入了具有不同亲脂性和空间位阻（例如烷基和芳基-烷基）功能的取代基吡唑环的位置，而在双环核的C 6位置引入具有不同电子性质的酰基，以探测电子和位置效应。大部分的PP系列的合成衍生物的呈现良好的亲和力在HA 3 AR，由低微摩尔范围内的所指示ķ我值和它们之间，化合物63用N 2个的新戊取代基显示最有效的HA 3与AR的亲和力ķ我0.9μM的值和高选择性（hA 1 AR / hA 3 AR => 111＆hA 2A AR /

  DOI：

  10.1016/j.bmc.2014.01.018

文献信息

• Discovery of simplified N2-substituted pyrazolo[3,4-d]pyrimidine derivatives as novel adenosine receptor antagonists: Efficient synthetic approaches, biological evaluations and molecular docking studies
  作者：Gopalakrishnan Venkatesan、Priyankar Paira、Siew Lee Cheong、Kosaraju Vamsikrishna、Stephanie Federico、Karl-Norbert Klotz、Giampiero Spalluto、Giorgia Pastorin

  DOI：10.1016/j.bmc.2014.01.018

  日期：2014.3

  employed to design novel bicyclic pyrazolo[3,4-d]pyrimidine (PP) derivatives from tricyclic pyrazolo[4,3-e]-1,2,4-triazolo-[1,5-c]pyrimidines (PTP) as promising human A3 adenosine receptor (hA3AR) antagonists. All the target compounds were synthesized using novel and efficient synthetic schemes and the structure–activity relationship studies of these PPs were explored through the synthesis of a series of

  在本研究中，采用了这样的分子的简化的方法来设计新的双环吡唑并[3,4- d ]从三环吡唑并嘧啶（PP）衍生物[4,3- ë ] -1,2,4-三唑并[1， 5- c ]嘧啶（PTP）作为有前途的人类A 3腺苷受体（hA 3 AR）拮抗剂。使用新颖有效的合成方案合成了所有目标化合物，并且通过合成一系列具有各种取代基的PTP类似物，探索了这些PP的结构-活性关系研究。在N 2处引入了具有不同亲脂性和空间位阻（例如烷基和芳基-烷基）功能的取代基吡唑环的位置，而在双环核的C 6位置引入具有不同电子性质的酰基，以探测电子和位置效应。大部分的PP系列的合成衍生物的呈现良好的亲和力在HA 3 AR，由低微摩尔范围内的所指示ķ我值和它们之间，化合物63用N 2个的新戊取代基显示最有效的HA 3与AR的亲和力ķ我0.9μM的值和高选择性（hA 1 AR / hA 3 AR => 111＆hA 2A AR /
• Synthesis of 2?-Deoxyribofuranosides of 8-Aza-7-deazaguanine and Related Pyrazolo[3,4-d]pyrimidines
  作者：Frank Seela、Herbert Steker

  DOI：10.1002/hlca.19860690714

  日期：1986.10.29

  N(1)-and N(2)-substituted 4-thioxo analogues 17a and 18a, respectively. The ratio of N(1)- to N(2)-glycosylation was 2:1 for 7c and 1:1 for 7a, viz. depending on the nucleobase structure. The rate of the H+-catalyzed N-glycosyl hydrolysis was strongly decreased for the N(2)-(β-D-2′-deoxyribofuranosides) as compared to the N(1)-compounds. However, the N(1)-nucleoside 1, which is an isostere of 2′-deoxyguanosine

  所述Ñ（1） -和Ñ（2） - （2'- deoxyribofuranosides）1和2，分别为8-氮杂-7-脱氮鸟嘌呤的制备通过相转移的糖基化在存在或不存在卜4 NHSO 4作为6-氨基-4-甲氧基-1 H-吡唑并[3,4- d ]嘧啶（7c）与2-脱氧-3,5-二-O-（对甲苯甲酰基）-α-D-赤型-的催化剂戊呋喃糖酰氯（10）。以类似的方式，但是没有催化剂并且使用THF作为有机相，6-氨基-4-氯核苷11b和12b从7a合成并分别转化为N（1）-和N（2）-取代的4-thioxo类似物17a和18a。的比率Ñ（1） -至Ñ（2）-glycosylation为2：1 7C和1：1为图7a，即 取决于核碱基的结构。与N（1）化合物相比，N（2）-（β-D-2'-脱氧核糖呋喃糖苷）的H +催化N-糖基水解速率大大降低。但是，N（1）-核苷1它是2'-脱氧鸟苷的等排物，具有足够的稳定性，可稍后用于固相寡核苷酸合成。
• A facile and novel synthesis of N2-, C6-substituted pyrazolo[3,4-d]pyrimidine-4 carboxylate derivatives as adenosine receptor antagonists
  作者：G. Venkatesan、P. Paira、S.L. Cheong、S. Federico、K.N. Klotz、G. Spalluto、G. Pastorin

  DOI：10.1016/j.ejmech.2015.01.046

  日期：2015.3

  An efficient synthetic procedure was adopted to synthesize a series of new molecules containing the pyrazolo[3,4-d]pyrimidine (PP) scaffold, which have been evaluated as promising human adenosine receptor (AR) antagonists. The effect of substitutions at the N-2, C-4 and C-6 positions of PPs on the affinity and selectivity towards the adenosine receptors were explored. Most of the pyrazolo[3,4-d]pyrimidine-4-carboxylates displayed from moderate to good affinity at the human A(3)AR (hA(3)AR), as indicated by the low micromolar range of K-i values (K-i hA(3)AR = 0.7-34 mu M). In particular, compounds 60 and 62 displayed good affinity at the hA(3)AR (60, K-i hA(3)AR = 2.2 mu M and 62, K-i hA(3)AR = 2.9 mu M) and selectivity towards the other AR subtypes (60, >46-fold selective and 62, >34-fold selective, respectively). In view of these results, these novel PP analogues were docked both in the crystallographic structure of the hA(2A)AR and in a homology model of the hA(3)AR in order to support the structure activity relationship (SAR) analysis. These preliminary results demonstrated that pyrazolo[3,4-d]pyrimidine can be considered a promising scaffold to obtain new molecules with potent hA(3)AR antagonist activity. (C) 2015 Elsevier Masson SAS. All rights reserved.