8-methyl-2,3-dihydrothiazolo[3,2-c]pyrimidine-5,7-dione | 39931-58-3

• 分子结构分类: 有机化合物 - 有机硫化合物 - 硫醚类
• 英文名称: 8-methyl-2,3-dihydrothiazolo[3,2-c]pyrimidine-5,7-dione
• 英文别名: 8-methyl-2,3-dihydro-thiazolo[3,2-c]pyrimidine-5,7-dione；8-methyl-2,3-dihydro-[1,3]thiazolo[3,2-c]pyrimidine-5,7-dione
• CAS: 39931-58-3
• 化学式: C₇H₈N₂O₂S
• 分子量: 184.219
• InChiKey: USEMUHNMXGIFOL-UHFFFAOYSA-N

物化性质

• 熔点：
  >250 °C
• 密度：
  1.49±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.1
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  74.7
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  甲基丙烯腈 、 8-methyl-2,3-dihydrothiazolo[3,2-c]pyrimidine-5,7-dione 在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 22.0h， 以24.9%的产率得到2-Methyl-3-(8-methyl-5,7-dioxo-2,3-dihydro-[1,3]thiazolo[3,2-c]pyrimidin-6-yl)propanenitrile
  参考文献：
  名称：

  A new class of potent hypolipemic agents raising high-density lipoproteins. Synthesis, reactions and pharmacological properties

  摘要：

  A series of thiazolo[3,2-c]pyrimidin-5,7-diones has been synthesized. Results from in vivo evaluations in rats have shown that many of these compounds produce a pronounced increase of HDL cholesterol and a marked decrease of LDL and VLDL cholesterol. The most potent compound 17 (30 mg/kg/d per os over 7 d in male rats) led to the following changes: HDL cholesterol + 101%, LDL cholesterol -40%, and VLDL cholesterol -98%. These effects may result in antiatherosclerotic properties in these compounds. The preparation of 7-amino-2,3-dihydrothiazolo[3,2-a]pyrimidin-5-ones and 5-amino-2,3-dihydrothiazolo[3,2-a] pyrimidin-7-ones is described.

  DOI：

  10.1016/0223-5234(94)90105-8
• 作为产物：
  描述：

  2-乙基-4,5-二氢噻唑 在 盐酸 作用下， 以 苯 为溶剂， 反应 8.5h， 生成 8-methyl-2,3-dihydrothiazolo[3,2-c]pyrimidine-5,7-dione
  参考文献：
  名称：

  酰基和硫代酰基异氰酸酯的研究-XI：苯甲酰基和硫代苯甲酰基异氰酸酯与2-噻唑啉和2-恶唑啉的反应

  摘要：

  异氰酸硫代苯甲酰基酯加到2-噻唑啉及其2-甲基衍生物中，得到相应的（4 + 2）环加合物。异氰酸苯甲酰基酯与2-甲基噻唑啉的反应得到2，3-二氢-5-苯基-8-苯甲酰基氨基甲酰基噻唑并[3，2-c]嘧啶-7-one。异氰酸苯甲酰基酯与2-甲基-2-噻唑啉和-2-恶唑啉在90°下反应形成相应的8-硫苯甲酰基氨基甲酰基噻唑并-和-恶唑并[3,2-c]嘧啶-7-酮，而苯甲酰基异氰酸酯与2 -甲基恶唑啉提供2∶1的加合物，其与乙酸产生相应的恶唑并[3，2-c]嘧啶。异氰酸苯甲酰酯与2-乙基-2-噻唑啉反应生成2,3-二氢-6-苯甲酰基-8-甲基噻唑并[3,2-c]嘧啶-5,7-二酮和2,3-二氢-5-苯基-8-甲基噻唑并[3，2-c]嘧啶-7-一；描述了它们的酸和碱水解。通过两种异氰酸酯对2-烷基-2-噻唑啉和-2-恶唑啉的互变异构烯胺的β-碳的攻击。

  DOI：

  10.1016/0040-4020(72)88081-5

文献信息

• Generation of Cyclic Ketene-<i>N</i>,<i>X</i>-Acetals (X = O, S) from 2-Alkyl-1,3-oxazo­lines and 2-Alkyl-1,3-thiazolines. Reactions with Acid Chlorides, 1,3-Diacid Chlorides and<i>N</i>-(Chlorocarbonyl) Isocyanate
  作者：Aihua Zhou、Charles U. Pittman Jr.

  DOI：10.1055/s-2005-918499

  日期：——

  reacted with monoacid chlorides, diacid chlorides, triacid chlorides. A series of these carbon-carbon bond-forming reactions and cyclizations to both substituted 2,3-dihydrooxazolo[3,2-a]pyridine-5,7-diones and 2,3-dihydrothiazolo[3,2-a]pyridine-5,7-diones proceeded under mild reaction conditions. Cyclic ketene-N,X-acetal intermediates play important roles in all these reactions. Related cyclizations

  2-烷基-l,3-恶唑啉、2-烷基-l,3-噻唑啉以及衍生自它们的相应环状乙烯酮-N,X-缩醛（X = O, S）与一元酰氯、二酰氯反应，三酰氯。一系列这些碳-碳键形成反应和环化反应生成取代的 2,3-二氢恶唑并[3,2-a]吡啶-5,7-二酮和 2,3-二氢噻唑并[3,2-a]吡啶- 5,7-二酮在温和的反应条件下进行。环状烯酮-N,X-缩醛中间体在所有这些反应中发挥重要作用。与 N-(氯羰基) 异氰酸酯的相关环化反应形成取代的 2,3-二氢恶唑并[3,2-c]嘧啶-5,7-二酮和 2,3-二氢噻唑并[3,2-c]嘧啶-5,7-二酮.
• Cyclizations of 2-alkylthiazolines and 2-alkyloxazolines with α,α-disubstituted diacid chlorides or N-(chlorocarbonyl) isocyanate
  作者：Aihua Zhou、Charles U. Pittman

  DOI：10.1016/j.tetlet.2005.01.146

  日期：2005.3

  Two-step cyclizations of 2-alkylthiazolines or 2-alkyloxazolines with alpha,alpha-disubstituted diacid chlorides produce excellent yields of 6,6-dialkyl-2,3-dihydrothiazolo[3,2-a]pyridine-5,7-diones and 6,6-dialkyl-2,3-dihydrooxazolo[3,2-ci]pyridine-5,7-diones in refluxing acetonitrile containing Et3N. Similar cyclizations using N-(chlorocarbonyl) isocyanate in place of diacid chlorides produced 2,3-dihydrothiazolo[3,2-c]pyrimidine-5,7-diones or 2,3-dihydrooxazolo[3,2-c]pyrimidine-5,7-diones, respectively. Each cyclization proceeded through cyclic ketene-N,X-acetal (X = O or S) intermediates. (C) 2005 Elsevier Ltd. All rights reserved.
• A new class of potent hypolipemic agents raising high-density lipoproteins. Synthesis, reactions and pharmacological properties
  作者：H FURRER、E GRANZER、R WAGNER

  DOI：10.1016/0223-5234(94)90105-8

  日期：——

  A series of thiazolo[3,2-c]pyrimidin-5,7-diones has been synthesized. Results from in vivo evaluations in rats have shown that many of these compounds produce a pronounced increase of HDL cholesterol and a marked decrease of LDL and VLDL cholesterol. The most potent compound 17 (30 mg/kg/d per os over 7 d in male rats) led to the following changes: HDL cholesterol + 101%, LDL cholesterol -40%, and VLDL cholesterol -98%. These effects may result in antiatherosclerotic properties in these compounds. The preparation of 7-amino-2,3-dihydrothiazolo[3,2-a]pyrimidin-5-ones and 5-amino-2,3-dihydrothiazolo[3,2-a] pyrimidin-7-ones is described.
• Studies of acyl and thioacyl isocyanates—XI
  作者：O. Tsuge、S. Kanemasa

  DOI：10.1016/0040-4020(72)88081-5

  日期：1972.1

  Thiobenzoyl isocyanate adds to 2-thiazoline and its 2-methyl derivative to afford the corresponding (4 + 2) cycloadducts. Reaction of benzoyl isocyanate with 2-methylthiazoline gives 2,3-dihydro-5-phenyl-8-benzoylcarbamoylthiazolo[3,2-c]pyrimidin-7-one. Thiobenzoyl isocyanate reacts with 2-methyl-2-thiazoline and -2-oxazoline at 90° to form the corresponding 8-thiobenzoylcarbamoylthiazolo- and -oxazolo[3

  异氰酸硫代苯甲酰基酯加到2-噻唑啉及其2-甲基衍生物中，得到相应的（4 + 2）环加合物。异氰酸苯甲酰基酯与2-甲基噻唑啉的反应得到2，3-二氢-5-苯基-8-苯甲酰基氨基甲酰基噻唑并[3，2-c]嘧啶-7-one。异氰酸苯甲酰基酯与2-甲基-2-噻唑啉和-2-恶唑啉在90°下反应形成相应的8-硫苯甲酰基氨基甲酰基噻唑并-和-恶唑并[3,2-c]嘧啶-7-酮，而苯甲酰基异氰酸酯与2 -甲基恶唑啉提供2∶1的加合物，其与乙酸产生相应的恶唑并[3，2-c]嘧啶。异氰酸苯甲酰酯与2-乙基-2-噻唑啉反应生成2,3-二氢-6-苯甲酰基-8-甲基噻唑并[3,2-c]嘧啶-5,7-二酮和2,3-二氢-5-苯基-8-甲基噻唑并[3，2-c]嘧啶-7-一；描述了它们的酸和碱水解。通过两种异氰酸酯对2-烷基-2-噻唑啉和-2-恶唑啉的互变异构烯胺的β-碳的攻击。