Construction of cyclopentane-fused coumarins <i>via</i> DBU-catalyzed [3+2] cycloaddition of 3-homoacyl coumarins with cyclic 1-azadienes

Lin, Huawei; Yang, Huimin; Gong, Qi; Luo, Shijian; Gu, Jing; Cao, Xiaoqun; Mao, Biming; Ge, Yanqing; Yuan, Chunhao

doi:10.1039/d1ra03387e

Cited by 8 publications

(2 citation statements)

References 48 publications

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“…Based on this, two subsystems of virtual simulation technology, virtual reality and energy consumption simulation, are proposed to be fully used in building energy efficiency and analyzed in conjunction with actual engineering applications to seek a new approach for the design and research of building energy efficiency [10]. Wireless Communications and Mobile Computing actual systems with the help of system models [11]. It is economical, isolated, safe and controllable, fast, and predictable, which can effectively solve the problem of the connection between abstract thinking and the entities it generates.…”

Section: Literature Reviewmentioning

confidence: 99%

Research on Online Virtual Energy-Saving and Environment-Friendly Building Design and Implementation Based on VRML

Zheng-wen

Zeng

Zhou

2022

Wireless Communications and Mobile Computing

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In order to change the status quo of lacking holistic and intuitive research on building energy efficiency in China, an online virtual energy-saving and environment-friendly building system based on VRML was proposed. The two subsystems of virtual simulation technology, “virtual reality” and “energy consumption simulation,” were integrated and applied to the design research of building energy efficiency. On the basis of inheriting the advantages of the traditional way, the independent application mode of the two was changed. The application analysis was carried out using a real energy-saving demonstration project as the research object. The experimental results showed that the energy-saving rate of the enclosure structure of the three buildings was 35.742%, 30.408%, and 35.696%, respectively. It was concluded that the system provided a more systematic and intuitive method to the design and research of building energy efficiency.

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Section: Literature Reviewmentioning

confidence: 99%

Research on Online Virtual Energy-Saving and Environment-Friendly Building Design and Implementation Based on VRML

Zheng-wen

Zeng

Zhou

2022

Wireless Communications and Mobile Computing

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“…The accumulation of these diseases to a certain extent will affect the overall appearance of the bridge, lead to the decline of bridge bearing capacity, and seriously affect the safety, applicability, and durability of the bridge structure. In recent years, accidents such as collapse and overturning of bridge structures caused by vehicle overload and adverse environment have occurred frequently [1]. As an important part of bridge structure operation and maintenance, bridge inspection plays an indispensable role in the analysis and evaluation of bridge structure bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

Construction of Intelligent Building Integrated Evaluation System Based on BIM Technology

Song¹

2022

Advances in Multimedia

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In order to alleviate the impact of the old bridge by the environment and its own life and the problem of increasing maintenance cost, the intelligent building integrated evaluation system based on BIM technology is proposed. Firstly, based on BIM technology, an all-weather hardware monitoring system is constructed by using multiple sensors laid on the bridge. The software communicates with the monitoring system through 5G public network and applies the unique advantages of deep neural network in classification to the assessment of the health status of old bridges with the help of the multiclassification convolutional neural network embedded in the software. The test results show that the preprocessed data is imported into the health diagnosis module for training, and the training accuracy reaches about 70%, and the loss curve is stable at about 0.5. Conclusion. The system meets the design requirements and solves the problem of difficult health diagnosis caused by long monitoring period and low efficiency of old bridges. The system has advantages of low difficulty in obtaining parameters, high precision, and accurate health assessment.

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Facile Access to Saccharin‐Fused 1,4‐Dihydropyridines through [3+3] Annulation Reactions

Jia

Chang

et al. 2022

Eur J Org Chem

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An efficient approach to saccharin-fused 1,4-DHPs has been established by using a [3 + 3] annulation process. The chemical event was enabled by a Et 3 N-catalyzed tandem Michael/aza-Pinner reaction of alkyl cyclic N-sulfonyl ketimines as nucleophiles with α,α-dicyanoolefins. Under mild conditions, the desired products were readily prepared in good to excellent yields and with broad functional group tolerance (up to 95 % yield, 29 examples). Notably, this practical methodology features the synthesis of pentacyclic spirooxindoles bearing a quaternary spiro-stereocenter.[a] Z.

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Construction of cyclopentane-fused coumarins via DBU-catalyzed [3+2] cycloaddition of 3-homoacyl coumarins with cyclic 1-azadienes

Abstract: A metal-free DBU catalyzed [3+2] cycloaddition of 3-homoacyl coumarins with cyclic 1-azadienes has been developed for the synthesis of cyclopentane-fused coumarins with excellent diastereoselectivity and complete chemoselectivity.

Cited by 8 publications

References 48 publications

Research on Online Virtual Energy-Saving and Environment-Friendly Building Design and Implementation Based on VRML

Research on Online Virtual Energy-Saving and Environment-Friendly Building Design and Implementation Based on VRML

Construction of Intelligent Building Integrated Evaluation System Based on BIM Technology

Facile Access to Saccharin‐Fused 1,4‐Dihydropyridines through [3+3] Annulation Reactions

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