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Aromatic and olefinic C–H alkenylation by catalysis with spirocyclic NHC Ru(Ⅳ) pincer complex

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Science China Chemistry 2023年第10期66卷 2791-2796页

作者： Heng Cai Yong-Qiang Tu ka lu Qi-Long Chen Fu-Min Zhang Xiao-Ming Zhang Yuan-Jiang Pan Zhi-Bo Yan State Key Laboratory of Applied Organic Chemistry&College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Department of Chemistry Zhejiang UniversityHangzhou 310027China

Catalyst innovation lies at the heart of transition-metal-catalyzed reaction development. In this article, we have explored the C(sp2)–H alkenylation activity with novel spirocyclic N-heterocyclic carbene(NHC)-based cyclometalated ruthenium pincer catalyst system, SNRu-X. After screening catalyst and condition, a high valent Ru(Ⅳ) dioxide(X = O_(2)) species has demonstrated superior reactivity in the catalytic alkenylation of aromatic and olefinic C–H bonds with unactivated alkenyl bromides and triflates. This reaction has achieved the easy construction of a wide range of(hetero)aromatic alkenes and dienes, in good to excellent yields with exclusive selectivity. Preliminary mechanistic studies indicate that this reaction may proceed through a single electron transfer(SET) triggered oxidative addition, by doing so, providing valuable complementary to classical alkenylation reactions that are dependent on activated alkenyl precursors.

关键词： transitionmetal catalysis spirocyclic NHC-Ru pincer catalyst C-H alkenylation single electron transfer pathway unactivated alkenyl bromides and triflates

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别样的视角:《瓦尔特保卫萨拉热窝》与《桥》在中国的接受研究

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文艺理论与批评 2019年第2期 98-111页

作者：路卡北京大学中文系

《瓦尔特保卫萨拉热窝》(简称《瓦尔特》,下文同)与《桥》这两部南斯拉夫影片在中国所产生的影响,令人惊叹不已。它们是“文革”结束后引起轰动的两部外国影片,在七八十年代的中国,它们不仅获得了巨大成功,更成为很多中国人关于这一历... 详细信息

《瓦尔特保卫萨拉热窝》(简称《瓦尔特》,下文同)与《桥》这两部南斯拉夫影片在中国所产生的影响,令人惊叹不已。它们是“文革”结束后引起轰动的两部外国影片,在七八十年代的中国,它们不仅获得了巨大成功,更成为很多中国人关于这一历史时段的重要文化记忆。它们在中国首映的二十年甚至三十年之后,仍有许多喜爱者,我们甚至可以说这两部影片在中国观众眼中堪称经典。

关键词：萨拉热窝中国人《桥》接受研究保卫外国影片南斯拉夫 “文革”

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卡尔松肯定美学指瑕

河北学刊 2016年第5期36卷 212-216页

作者：鲁卡南开大学哲学院天津300355

卡尔松肯定美学的一些问题来源于其对沃尔顿的"恰当审美"理论模型的转换应用,并且衍生出一些新的问题。他的科学认知模式作为一种自然鉴赏方式完全合理,但若强势介入自然审美便有些勉强。传统的无利害审美观其实并无不妥,因为无利害要... 详细信息

卡尔松肯定美学的一些问题来源于其对沃尔顿的"恰当审美"理论模型的转换应用,并且衍生出一些新的问题。他的科学认知模式作为一种自然鉴赏方式完全合理,但若强势介入自然审美便有些勉强。传统的无利害审美观其实并无不妥,因为无利害要求是针对审美主体而非审美对象。卡尔松的肯定美学是对"人类中心主义"的矫枉过正,并有可能会产生一些事与愿违的情况。

关键词：卡尔松肯定美学无利害

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Nomogram to predict severe retinopathy of prematurity in Southeast China

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 282-288页

作者： Dan Liu Xing-Yong Li Hong-Wu He ka-lu Jin Ling-Xia Zhang Yang Zhou Zhi-Min Zhu Chen-Chen Jiang Hai-Jian Wu Sui-Lian Zheng Department of Ophthalmology the Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina Taizhou Optometry Hospital Taizhou 318001Zhejiang ProvinceChina Department of Ophthalmology Jiaxing Maternity and Child Health Care HospitalJiaxing 314009Zhejiang ProvinceChina Department of Ophthalmology Taizhou Women and Children’s Hospital of Wenzhou Medical UniversityTaizhou 318001Zhejiang ProvinceChina Clinical Medical Research Center the Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina Department of Ophthalmology Taizhou Municipal HospitalTaizhou 318099Zhejiang ProvinceChina

AIM:To define the predictive factors of severe retinopathy of prematurity(ROP)and develop a nomogram for predicting severe ROP in southeast ***:Totally 554 infants diagnosed with ROP hospitalized in the Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University and hospitalized in Taizhou Women and Children’s Hospital were *** data and 43 candidate predictive factors of ROP infants were collected *** regression model was used to identify predictive factors of severe ROP and to propose a nomogram for individual risk prediction,which was compared with WINROP model and Digirop-Birth ***:Infants from the Second Affiliated Hospital and Yuying Children’s Hospital of Wenzhou Medical University(n=478)were randomly allocated into training(n=402)and internal validation group(n=76).Infants from Taizhou Women and Children’s Hospital were set as external validation group(n=76).Severe ROP were found in 52 of 402 infants,12 of 76 infants,and 7 of 76 infants in training group,internal validation group,and external validation group,*** weight[odds ratio(OR),0.997;95%confidence interval(CI),0.996-0.999;P<0.001],multiple births(OR,1.885;95%CI,1.013-3.506;P=0.045),and non-invasive ventilation(OR,0.288;95%CI,0.146-0.570;P<0.001)were identified as predictive factors for the prediction of severe ROP,by univariate analysis and multivariate *** predicting severe ROP based on the internal validation group,the areas under receiver operating characteristic curve(AUC)was 78.1(95%CI,64.2-92.0)for the nomogram,32.9(95%CI,15.3-50.5)for WINROP model,70.2(95%CI,55.8-84.6)for Digirop-Birth *** external validation group,AUC of the nomogram was also higher than that of WINROP model and Digirop-Birth model(80.2 versus 51.1 and 63.4).The decision curve analysis of the nomogram demonstrated better clinical efficacy than that of WINROP model and Digirop-Birth *** calibration curves demonst

关键词： retinopathy of prematurity nomogram predictive factor birth weight multiple births non-invasive ventilation

De novo synthesis of atropisomeric benzofurans via Cu/SPDO complex catalyzed asymmetric formal [3 + 2] annulation

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Science China Chemistry 2024年

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鉴赏判断及其四契机运用之必然性

上海大学学报(社会科学版) 2021年第4期38卷 98-107页

作者：鲁卡程相占山东大学文艺美学研究中心

鉴赏判断的一般形式是"某物是美的",这是一个先天综合判断,康德鉴赏判断的分析论及演绎就是立足于这一判断。康德为何以及是否有必要运用四契机对鉴赏判断进行分析是一个有争议的问题,"第一批判"可以提供某种启示,但鉴赏判断毕竟不同于... 详细信息

鉴赏判断的一般形式是"某物是美的",这是一个先天综合判断,康德鉴赏判断的分析论及演绎就是立足于这一判断。康德为何以及是否有必要运用四契机对鉴赏判断进行分析是一个有争议的问题,"第一批判"可以提供某种启示,但鉴赏判断毕竟不同于逻辑的规定性判断,无论是从现实经验的角度,还是从严格的逻辑学的角度,都不适合把它只视为一个在语言上(无论说出与否)发生的判断,从而对它进行单纯语形或语义上的分析;而且鉴赏判断所真正评判和断言的也不是把某物宣称为美的。它是从鉴赏活动本身的反思中所抽象出来的一个一般判断形式,是这一反思的表象,亦是鉴赏判断本身的概念的表象,因为构成这一判断形式的各要素即表征着鉴赏评判的各方面特征,而四契机所阐明的是鉴赏判断本身的特性。鉴赏判断的四契机就是以鉴赏活动本身为认知对象进而对它的概念进行分析,由此可见四契机运用的必然性。

关键词：先天综合判断好像主观性好像客观性鉴赏评判鉴赏判断