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    • 34. 发明申请
    • DIFFERENTIATED, INTEGRATED AND INDIVIDUALIZED EDUCATION
    • 差异化,一体化和个性化教育
    • WO2009151860A1
    • 2009-12-17
    • PCT/US2009/043806
    • 2009-05-13
    • LIANG, ChangnianLI, YuanYAN, PingyiZHANG, Xiaofeng
    • LIANG, ChangnianLI, YuanYAN, PingyiZHANG, Xiaofeng
    • G06N5/00
    • G06Q50/20
    • A computer-based learning system uses knowledge points organized with a predefined multilevel arrangement. Each knowledge point has an information set which may include a knowledge content, an evaluation content and a solution content. For a given knowledge point, the learning system provides the knowledge content and evaluation content, analyzes the user's answers to the evaluation content and determines the next knowledge point to be studied by the user based on the user's answers and the predefined multilevel arrangement of the knowledge points. The learning system thus provides a different learning course for different users to achieve individualized learning. User's learning history may be recorded to facilitate reviews by the user and improve the selection of the next knowledge point. Users may provide feedbacks on knowledge contents and evaluation contents, and may even suggest their own knowledge contents and evaluation contents to improve the learning system and user participation.
    • 基于计算机的学习系统使用以预定义多级布置组织的知识点。 每个知识点具有可以包括知识内容,评估内容和解决方案内容的信息集。 对于给定的知识点,学习系统提供知识内容和评估内容,分析用户对评估内容的答案,并根据用户的答案和知识的预定义多层次排列确定用户要研究的下一个知识点 点。 因此,学习系统为不同用户提供了不同的学习课程,以实现个性化学习。 可以记录用户的学习历史以促进用户的评论并改进下一个知识点的选择。 用户可以提供知识内容和评估内容的反馈意见,甚至可以提出自己的知识内容和评估内容,以改善学习系统和用户参与。
    • 35. 发明申请
    • IMPROVED PROCESS FOR THE PREPARATION OF (S)-ALPHA-ETYL-2-OXO-1-PYRROLIDINEACETAMIDE AND (R)-ALPHA-ETHYL-2-OXO-1-PYRROLIDINEACETAMIDE
    • (S)-ALPHA-ETYL-2-氧代-1-吡咯烷胺乙酰胺和(R)-ALPHA-乙基-2-氧代-1-吡咯烷胺乙酰胺的改进方法
    • WO2006053441A1
    • 2006-05-26
    • PCT/CA2005/001758
    • 2005-11-21
    • APOTEX PHARMACHEM INC.LI, Yuan, QiangWANG, Zhi-XianGUNTOORI, Bhaskar, Reddy
    • LI, Yuan, QiangWANG, Zhi-XianGUNTOORI, Bhaskar, Reddy
    • C07D207/277
    • C07D207/27
    • A process provided for the preparation of the (S)- and (R)- alpha- ethyl-2-oxo-1- pyrrolidineacetamide of formula:(1) from (RS)-alpha-ethyl-2-oxo-l-pyrrolidineacetic acid of formula: (2) comprising: i) combining the (RS)-2 with a chiral base (resolving agent) in a resolution solvent and crystallizing from the said mixture the diastereomeric salt of (S)- or (R)-2 and chiral base; ii) regenerating (S)- or (R)-2 from the crystallized diastereomeric salt by treating with a suitable acid or acidic ion-exchange resin; iii) optionally regenerating (R)- or (S)-2 or their mixture (predominantly one enantiomer) from the crystallization mother liquor by treating with a suitable acid or acidic ion-exchange resin; iv) optionally epimerizing (RS)-2 by treating (R)- or (S)-2 or their mixture (predominantly one enantiomer) of step iii with an acid anhydride; V) optionally converting (RS)-2 of step iv into enantiomerically enriched (S)- or (R)-2 through steps i and ii; vi) formation of the mixed anhydride by reacting (R)- or (S)-2 with an alkyl or aryl sulfonyl halogen compound RSO2X in the presence of a suitable base; and vii) reacting the mixed anhydride with ammonia; wherein R represents C 1 to C 15 alkyl or aryl groups such as methyl, ethyl, p-toluenyl, 2,4,6-trimethylbenzyl, 2,4,6-trichloribenzyl, and X represents a halogen atom such as F, Cl and Br atoms.
    • (S) - (R)-α-乙基-2-氧代-1-吡咯烷乙酰胺由(RS)-α-乙基-2-氧代-1-吡咯烷乙酸制备的(S) - 和(R)-α-乙基-2-氧代-1-吡咯烷乙酰胺 式(2)的酸包括:i)将(RS)-2与分解溶剂中的手性碱(拆分剂)组合并从所述混合物中结晶出(S) - 或(R)-2的非对映体盐 和手性基; ii)通过用合适的酸或酸性离子交换树脂处理从结晶的非对映体盐再生(S) - 或(R)-2) iii)通过用合适的酸或酸性离子交换树脂处理任选地从结晶母液中再生(R) - 或(S)-2或它们的混合物(主要是一种对映异构体) iv)通过用酸酐处理(R) - 或(S)-2或它们的步骤iii的混合物(主要是一个对映异构体)任选差向异构化(RS)-2; V)任选地通过步骤i和ii将步骤iv的(RS)-2转化成对映异构体富集的(S) - 或(R) vi)通过使(R) - 或(S)-2与烷基或芳基磺酰基卤化合物RSO 2 X在合适的碱存在下反应形成混合酸酐; 和vii)使混合酸酐与氨反应; 其中R表示C 1至C 15烷基或芳基如甲基,乙基,对甲苯基,2,4,6-三甲基苄基,2,4,6-三氯苄基,X表示卤素原子如F,Cl和 Br原子。