4-amino-1-(β-D-ribofuranosyl)-1H-pyrazolo[3,4-d]pyrimidine-6-one | 85426-82-0

• 分子结构分类: 有机化合物 - 核苷、核苷酸和类似物 - 吡唑并[3，4-d]嘧啶糖苷
• 英文名称: 4-amino-1-(β-D-ribofuranosyl)-1H-pyrazolo[3,4-d]pyrimidine-6-one
• 英文别名: 8-aza-7-deazaisoguanosine；4-amino-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5H-pyrazolo[3,4-d]pyrimidin-6-one
• CAS: 85426-82-0
• 化学式: C₁₀H₁₃N₅O₅
• 分子量: 283.244
• InChiKey: WVLDFKKXRMZULV-MWKIOEHESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -3
• 重原子数：
  20
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  153
• 氢给体数：
  5
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  4-氨基-6-羟基吡唑-(3,4-d)嘧啶 在 N,O-双三甲硅基乙酰胺 、 三氟甲磺酸三甲基硅酯 、 氨 作用下， 以 甲醇 、 乙腈 为溶剂， 反应 16.08h， 生成 4-amino-1-(β-D-ribofuranosyl)-1H-pyrazolo[3,4-d]pyrimidine-6-one
  参考文献：
  名称：

  High-Throughput Five Minute Microwave Accelerated Glycosylation Approach to the Synthesis of Nucleoside Libraries

  摘要：

  [GRAPHICS]The Vorbruggen glycosylation reaction was adapted into a one-step 5 min/130 degrees C microwave assisted reaction. Triethanolamine in acetontrile containing 2% water was determined to be optimal for the neutralization of trimethylsilyl triflate allowing for direct MPLC purification of the reaction mixture. When coupled with a NH3/methanol deprotection reaction, a high-throughput method of nucleoside library synthesis was enabled. The method was demonstrated by examining the ribosylation of 48 nitrogen containing heteroaromatic bases that included 25 purines, four pyrazolopyrimidines, two 8-azapurines, one 2-azapurine, two imidazopyridines, two benzimidazoles, three imidazoles, three 1,2,4-triazoles, two pyrimidines, two 3-deazapyrimidines, one quinazolinedione, and one alloxazine. Of these, 32 yielded single regioisomer products, and six resulted in separable mixtures. Seven examples provided inseparable regioisomer mixtures of -two to three compounds (16 nucleosides), and three examples failed to yield isolable products. For the 45 single isomers isolated, the average two-step overall yield +/- SD was 26 +/- 16%, and the average purity +/- SD was 95 +/- 6%. A total of 58 different nucleosides were prepared of which 15 had not previously been accessed directly from glycosylation/deprotection of a readily available base.

  DOI：

  10.1021/jo061885l

文献信息

• Pyrazolo[3,4-d]pyrimidine ribonucleosides related to 2-aminoadenosine and isoguanosine: synthesis, deamination and tautomerism
  作者：Frank Seela、Kuiying Xu

  DOI：10.1039/b708736e

  日期：——

  than that of the related purines. The pK(a) values indicate that the 7-non-functionalized nucleosides 1a (pK(a) 5.8) and 15 (pK(a) 6.4) are possibly protonated in neutral conditions when incorporated into RNA. The nucleosides 3a-d exist predominantly in the keto (lactam) form with K(TAUT) (keto/enol) values of 400-1200 compared to 10(3)-10(4) for pyrrolo[2,3-d]pyrimidine isoguanosine derivatives 4a-c

  描述了与2-氨基腺苷和异鸟苷相关的8-氮杂-7-脱氮嘌呤（吡唑并[3,4-d]嘧啶）核糖核苷的合成和性质。在BF（3）存在下，将1-氮-乙酰基2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖与8-氮杂7-脱氮嘌呤-2,6-二胺5糖基化。 ）x Et（2）O作为催化剂，得到N（8）异构体14（73％）和痕量的N（9）异构体13a（4.8％）。在相同的反应条件下，7-卤代8-氮杂-7-脱氮嘌呤-2,6-二胺6-8提供了热力学上更稳定的N（9）核苷13b-d作为唯一产物（53-70％）。因此，位置7的卤素将糖基化作用从N（8）转移到N（9）。通过2-氨基的重氮化将8-氮杂-7-脱氮嘌呤-4，6-二胺核糖核苷1a-d转化为异鸟苷衍生物3a-d。尽管化合物1a b。在7位（酶结合位点）不含氮，它们被腺苷脱氨酶脱氨；但是，它们的脱氨速度比相关嘌呤的速度要慢得多。pK（a）值表明，将7个非功能化核苷1a（pK（a）5