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Base-Promoted Synthesis of 3-Alkenyl-2-pyridones from N-Propargyl-β-enaminones and Aryl Aldehydes

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Chinese Journal of Chemistry 2021年第10期39卷 2781-2788页

作者： Qingyu Tian Shangyun Xiao guolin cheng Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing College of Materials Science and EngineeringInstrumental Analysis CenterHuaqiao UniversityXiamenFujian361021 China

Main observation and conclusion In this article,we report a base-promoted sequential cyclization/aldol-type condensation/isomerization cascade reaction of N-propargyl-β-enaminones with aryl aldehydes.The key step in this protocol is the generation of 1,4-oxazepine anions from N-propargyl-β-enaminones under basic conditions,which are captured by aryl aldehydes.The method allows the formation of one pyridone core and one C—C double bond in“one pot”,and the preparation of a variety of densely decorated pyridone derivatives in moderate to good yields with broad functional group tolerance.

关键词： Domino reactions Aldehydes Alkenes Enaminone Pyridones

铑(Ⅲ)催化苯甲亚胺酸乙酯和CF_(3)-亚胺氧锍叶立德C-H活化/环化反应合成CF_(3)-1H-苯并[de][1,8]萘吡啶

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有机化学 2024年第1期44卷 291-300页

作者：文思丁宇浩田青于葛进程国林安康学院化学化工学院陕西安康725000 华侨大学材料科学与工程学院厦门市光电材料及其先进制造重点实验室福建厦门361021

在铑催化下,实现了苯甲亚胺酸乙酯类化合物与CF_(3)-亚胺叶立德的C—H活化/环化多米诺反应.该合成策略具有良好的官能团耐受性和底物的普适性,合成了一系列含三氟甲基的1H-苯并[de][1,8]萘吡啶,产率为22%~86%.

关键词：铑催化苯甲胺酸乙酯三氟甲基氧锍叶立德苯并[de]萘吡啶

消费环境改善对居民消费潜力释放的影响研究——基于内蒙古12个地级市的实证检验

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商业经济研究 2024年第12期 52-57页

作者：成小平刘国林付焕内蒙古师范大学经济管理学院内蒙古呼和浩特010022

新发展格局下,拉动居民消费需求是扩大内需的重要内容之一。基于内蒙古2005-2021年居民消费环境和居民消费潜力的相关统计数据,分别构建居民消费环境指标体系和居民消费潜力指标体系,并且运用面板数据构建双固定效应模型考察消费环境对... 详细信息

新发展格局下,拉动居民消费需求是扩大内需的重要内容之一。基于内蒙古2005-2021年居民消费环境和居民消费潜力的相关统计数据,分别构建居民消费环境指标体系和居民消费潜力指标体系,并且运用面板数据构建双固定效应模型考察消费环境对消费潜力的影响,在此基础上构建以消费市场结构和居民消费结构为中介的中介效应模型,探讨居民消费环境是如何影响居民消费潜力的释放。其研究表明:消费环境的改善能够释放消费潜力;消费环境可以通过作用于供给侧消费市场结构和需求侧居民消费结构来释放居民消费潜力。

关键词：消费环境消费潜力内蒙古市场结构消费结构

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数字赋能文旅深度融合的理论逻辑与研究框架

旅游科学 2024年第1期38卷 1-16页

作者：黄震方张子昂李涛侯国林靳诚张郴南京师范大学地理科学学院江苏南京210023 江苏省地理信息资源开发与利用协同创新中心江苏南京210023

数字赋能文旅深度融合既是数字经济时代文旅发展的重要方式,又是文旅研究的重要课题。文章在阐述文旅深度融合内涵的基础上,探究了数字赋能文旅深度融合的基本逻辑,认为数字技术嵌入支撑文旅数字化,促进文旅信息融合化,带来文旅产业新变... 详细信息

数字赋能文旅深度融合既是数字经济时代文旅发展的重要方式,又是文旅研究的重要课题。文章在阐述文旅深度融合内涵的基础上,探究了数字赋能文旅深度融合的基本逻辑,认为数字技术嵌入支撑文旅数字化,促进文旅信息融合化,带来文旅产业新变革,形成文旅共生体和数字文旅新形态。从理论研究、数字赋能和融合实践3个维度,初步构建了数字赋能文旅深度融合的研究框架,强调要创新性地运用文旅IP理论、融合共生理论、文旅场景理论、产业演化理论、系统动力学等理论,阐释文旅融合学理及其内在逻辑、演化过程和动力机制,深化文旅深度融合主要科学问题研究。文章提出要把握数字赋能文旅融合的关键技术、文旅资源普查与评价、文旅融合场景建构、文旅产业融合创新生态体系、国家文化公园与文旅融合示范区建设、科技创新与数字文旅人才培养等关键问题,推动文旅融合应用实践和学术研究持续创新,更好地服务于新时代中国式现代化建设和文旅高质量发展。

关键词：数字赋能文旅融合理论逻辑研究框架科学问题

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翼管神经切断术的原理与实践

中华耳鼻咽喉头颈外科杂志 2024年第1期59卷 51-56页

作者：赵长青孙希才万玉柱叶菁谭国林刘剑锋王艳杰程冯丽安云芳山西医科大学第二医院耳鼻咽喉头颈外科太原030000 复旦大学附属眼耳鼻喉科医院耳鼻咽喉科上海200031 山东大学附属山东省耳鼻喉医院耳鼻咽喉头颈外科济南250022 南昌大学附属第一医院耳鼻咽喉头颈外科南昌330006 中南大学湘雅三医院耳鼻咽喉头颈外科长沙410013 中日友好医院耳鼻咽喉科北京100029

借助传统的神经环路可以实现神经-免疫的双向调控,这一发现为重新认识翼管神经切断术(vidian neurectomy,VN)提供了理论依据。本文就VN的发展历史、神经-免疫相互作用的原理、VN的应用解剖以及内镜术式进行重点介绍,旨在为临床展现一幅... 详细信息

借助传统的神经环路可以实现神经-免疫的双向调控,这一发现为重新认识翼管神经切断术(vidian neurectomy,VN)提供了理论依据。本文就VN的发展历史、神经-免疫相互作用的原理、VN的应用解剖以及内镜术式进行重点介绍,旨在为临床展现一幅较为全面的从理论到实践的VN画图。

关键词：变应性鼻炎神经免疫翼管神经切断术

Carbon-based supports for the electrocatalysis under industrially relevant conditions

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Science China Chemistry 2023年

作者： Xue Yang Xianrui Gu Yang Song guolin Hou cheng Wang Lichen Liu Wei Lin Center for Renewable Energy SINOPEC Research Institute of Petroleum Processing Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University

1 Introduction Carbon materials are ideal catalyst supports for functional metal components due to their appropriate physicochemical characteristics, such as high surface areas, tunable pore structures, variable morphologies and versatile surface properties based on chemical modifications, low cost and facile preparations from diverse precursors [1,2].

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Joint Effect of East Asia-Pacific and Eurasian Teleconnections on the Summer Precipitation in North Asia

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Journal of Meteorological Research 2020年第3期34卷 559-574页

作者： Po HU guolin FENG Muhammad Mubashar DOGAR Jianbo cheng Zhiqiang GONG Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research Institute of Heavy RainChina Meteorological AdministrationWuhan 430205China National Climate Center China Meteorological AdministrationBeijing 100081China Global Change Impact Studies Centre(GCISC) Ministry of Climate ChangeIslamabad 44000Pakistan College of Physical Science and Technology Yangzhou UniversityYangzhou 225002China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China

The East Asia-Pacific(EAP)and Eurasian(EU)teleconnections are independent of each other on the seasonal timescale(with a correlation coefficient of only 0.03).But they may occur concurrently with consistent or opposite phases.This paper investigates their synergistic effect on the summer precipitation in North Asia.Based on the signs/phases of EAP and EU indices,the EAP and EU teleconnection anomalies occur in four cases:(Ⅰ)positive EAP+positive EU,(Ⅱ)negative EAP+negative EU,(Ⅲ)positive EAP+negative EU,and(Ⅳ)negative EAP+positive EU.Further analyses show that these four configurations of EAP and EU anomalies are coherently related to different atmospheric circulations over the midlatitude Eurasian continent,leading to different summer precipitation modes in North Asia.CategoryⅠ(Ⅱ)corresponds to a zonal tripole structure of the geopotential height at 500 hPa over eastern Europe and the Sea of Japan,leading to less(more)than normal precipitation in eastern Europe,Japan,and the surrounding areas,and more(less)precipitation from central China to Lake Baikal and eastern Russia.CategoryⅢ(Ⅳ)corresponds to a meridional dipole structure of the geopotential height at 500 hPa over North Asia,leading to more(less)precipitation in the northern North Asia and less(more)precipitation in most of the southern North Asia.Independent analysis reveals that the EAP teleconnection itself is positively correlated with the precipitation in the region between the eastern part of Lake Baikal and Okhotsk Sea,and negatively correlated with the precipitation in the region between Northeast China and Japan.Coincidently,the EU pattern and precipitation have negative correlations in Ural Mountain and Okhotsk Sea areas and positive correlations in the Lake Baikal area.The respective relations of EAP and EU with the summer precipitation in North Asia suggest that the EAP northern lobe overlapped with the EU central and eastern lobes could extend the geopotential anomalies over Lake Baikal to Russian Far East,creating an EAP-EU synergistic effect

关键词： East Asia–Pacific(EAP)teleconnection Eurasian(EU)teleconnection synergistic effect precipitation

Base-Promoted N-Pyridylation of Heteroarenes Using N-Propargyl Enaminones as Equivalents of Pyridine Scaffolds

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Base-Promoted N-Pyridylation of Heteroarenes Using N-Proparg...

Synthesis of Substituted Pyridines Using N-Allyl Enaminones as Masked Azatrienes under Transition-Metal-Free Conditions

中国化学会第九届全国有机化学学术会议

作者： Yunxiang Weng Xifa Yang guolin cheng Xiuling Cui Engineering Research Center of Molecular Medicine Ministry of Education Key Laboratory of Xiamen Marine and Gene DrugsInstitutes of Molecular Medicine and School of Biomedical Sciences Huaqiao University

Our initial work began with a study of transformation of enaminones and propynone toward heterocycles.1-4]As research continues,we have described a general and operationally simple method to construct diverse 2-(1-heteroaryl)pyridines from reactions of N-propargyl enaminones with N-heteroarenes.This procedure allowed the formation of one pyridine core and one C-N bond

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Synthesis of Substituted Pyridines Using N-Allyl Enaminones ...