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smth

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       苯并噁唑和二氢吡唑类化合物是许多农药和医药的核心结构单元。苯并噁唑广泛存在于自然界中,它具有重要的药理活性,是医药化学的重要中间体,苯并噁唑的衍生物可以作为细胞毒性抑制剂、蛋白酶抑制剂和逆转录酶抑制剂等,苯并噁唑环衍生物的其他应用包括作为除草剂,荧光增白剂等;五元杂环化合物二氢吡唑及其衍生物是农药和医药的重要中间体,具有杀菌、杀虫和除草等活性,且许多吡唑类化合物表现出了良好的抗菌、抗结核、抗肿瘤、抗HIV-1和抗癌活性等。因此如何通过简单的方法从简单的原料出发构建这些骨架单元一直是化学工作者们努力的目标。虽然已经有多种方法可以合成这些化合物,但它们都普遍存在许多缺点,或是催化剂价格昂贵,或是反应步骤过于繁琐,或是反应前体难于制备等,所以发展一种能从简单易得的原料出发经过简短的合成步骤构建这些杂环化合物的方法仍然具有重要的意义。本论文主要研究从腈、烯烃等简单的原料出发利用串联反应构建苯并噁唑和二氢吡唑环的新合成方法。

[ Last edited by smth on 2012-4-10 at 12:53 ]

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liu2004m

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3楼: Originally posted by xinmor at 2012-04-10 13:13:03:
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4楼2012-04-10 13:31:18
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liu2004m

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smth: 金币+1, 博学EPI+1, 有帮助, 不知只有你会用 GOOGLE 的 2012-04-10 13:08:15
Benzo oxazole and dihydro-pyrazole compound is a core structural unit of many pesticides and medicine.Benzoxazole is widespread in nature, it has important pharmacological activity is an important intermediate of pharmaceutical chemistry, benzoxazole derivatives as cytotoxic inhibitors, protease inhibitors and reverse transcriptase inhibitors,benzoxazole ring derivatives other applications include herbicides, fluorescent brighteners; five heterocyclic compounds dihydro-pyrazole and its derivatives is an important intermediate of pesticide and medicine, has bactericidal, insecticidal and herbicidalother active pyrazole compounds showed good antibacterial, anti-tuberculosis, anti-tumor, anti-HIV-1 and anti-cancer activity.How simple methods starting from simple materials to build these skeleton units has been a goal of chemists have. Although there are several ways to synthesize these compounds, but they are common to many of the shortcomings, or expensive catalyst or reaction steps are too cumbersome, or precursors difficult preparation, the development of a from the simple the raw materials starting after a short synthetic steps to build these heterocyclic compounds is still of great significance. In this thesis, from simple raw materials such as nitrile, olefin starting a new synthetic method for the use of tandem reactions to construct the benzoxazole and dihydro-pyrazole ring.
2楼2012-04-10 13:03:25
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xinmor

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2楼: Originally posted by liu2004m at 2012-04-10 13:03:25:
Benzo oxazole and dihydro-pyrazole compound is a core structural unit of many pesticides and medicine.Benzoxazole is widespread in nature, it has important pharmacological activity is an important  ...

呵呵,liu版。
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