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18 results on '"Cheng-Yih Chen"'

4. A

Author

Evans, G. R., Potts, Malcolm, Hogendijk, Jan P., Sesiano, Jacques, Langermann, Y. Tzvi, Calvo, Emilia, Samsó, Julio, Dold-Samplonius, Yvonne, Cheng-Yih, Chen, Se, Ang Tian, Sarma, K. V., Richards, Paul, Bray, Francesca, Arora, R. K., Bolens, Lucie, Sakiura, Seiji, Turner, B. L., II, Clarke, William C., Schwerin, Karl H., Olofson, Harold, Pacey, Arnold, Jochi, Shigeru, Pregadio, Fabrizio, Dash, Bhagwan, Yong, Lam Lay, Hayashi, Takao, Rofa, Mat, Bin Ismail, Mat Rofa, Bakar, Osman, Arifin, Kamel, Atan, Mohd, Høyrup, Jens, Kunitzsch, Paul, Salem, Sema’an I., D’Ambrosio, Ubiratan, Rodrigue, Christine M., Martzloff, Jean-Claude, Smith, Julian A., Xiaoyuan, Jiang, Gupta, R. C., Shigeru, Nakayama, Tripathi, Vijaya Narayan, Lemay, Richard, Ōhashi, Yukio, King, David A., Culver, Roger B., Doyle, Laurance R., Frank, Edward W., Krupp, E. C., Haynes, Roslynn D., Yoke, Ho Peng, De Young, Gregg, Ammarell, Gene, Macri, Martha J., Dhanani, Alnoor, Berdan, Frances F., and Selin, Helaine, editor

Published
1997
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6. A C2-Symmetric Pool Based Flexible Strategy: An Enantioconvergent Synthesis of (+)-Valiolamine and (+)-Valienamine

Author

Wei‐Lin Zheng, Cheng‐Yih Chen, Tu-Hsin Yan, Hong-Jay Lo, and Shang‐Ming Yeh

Subjects
chemistry.chemical_compound, Ring-closing metathesis, Stereochemistry, Chemistry, Validoxylamine G, Valienamine, Organic Chemistry, Valiolamine, Diastereomer, Physical and Theoretical Chemistry
Abstract

A new enantioconvergent strategy directed toward the synthesis of glucosidase inhibitors was developed by using a C2-symmetric element within the chiral pool and by applying an iodine-promoted cyclization of an unsaturated carbonimidothioate for the regio- and diastereocontrolled installation of amino and hydroxy units. Not only does this simple flexible strategy provide a convergent concise approach to (+)-valiolamine (1), but it can also be readily adopted for the synthesis of (+)-valienamine (2). Commercially available and cheap C2-symmetric D-tartaric acid served as the chiral building block.

Published
2012
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7. A new entry to 1,5-keto esters and their 4,4-dideuterio derivatives via methylene chloride as 'methylene dianion' equivalents

Author

Kuo-Wei Lin, Cheng-Yih Chen, Wei-Fan Chen, and Tu-Hsin Yan

Subjects
Amides -- Chemical properties, Esters -- Chemical properties, Titanium -- Chemical properties, Biological sciences, Chemistry
Abstract

An extremely simple and practical Ti[Cl.sub.4]-Mg promoted synthesis of 1,5-keto esters via multicomponent coupling of various amides with C[H.sub.2][Cl.sub.2] and methyl acrylate is described. The efficiency of the reaction chemistry is demonstrated by the very simple preparation of unusual 4,4-dideuterio-1,5-keto esters.

Published
2008

8. A New Entry to 1,5-Keto Esters and Their 4,4-Dideuterio Derivatives via Methylene Chloride as 'Methylene Dianion' Equivalents

Author

Cheng-Yih Chen, Wei-Fan Chen, Kuo-Wei Lin, and Tu-Hsin Yan

Subjects
medicine.drug_class, Cyclopropanation, Organic Chemistry, Carboxamide, Chloride, Chemical synthesis, chemistry.chemical_compound, chemistry, medicine, Michael reaction, Organic chemistry, Methylene, Methyl acrylate, Dichloromethane, medicine.drug
Abstract

This TiCl 4-Mg promoted multicomponent coupling of various amides with CH(2)Cl(2) and methyl acrylate represents an extremely simple and practical synthesis of 1,5-keto esters. The efficiency of this chemistry is illustrated by the very simple preparation of unusual 4,4-dideuterio-1,5-keto esters.

Published
2008
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10. ChemInform Abstract: A New Entry to 1,5-Keto Esters and Their 4,4-Dideuterio Derivatives via Methylene Chloride as 'Methylene Dianion' Equivalents

Author

Tu-Hsin Yan, Cheng-Yih Chen, Wei-Fan Chen, and Kuo-Wei Lin

Subjects
chemistry.chemical_compound, Chemistry, medicine, General Medicine, Methylene, Methyl acrylate, Chloride, Medicinal chemistry, medicine.drug
Abstract

This TiCl 4-Mg promoted multicomponent coupling of various amides with CH(2)Cl(2) and methyl acrylate represents an extremely simple and practical synthesis of 1,5-keto esters. The efficiency of this chemistry is illustrated by the very simple preparation of unusual 4,4-dideuterio-1,5-keto esters.

Published
2008
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12. M

Author

R. C. Gupta, Karen Louise Jolly, Ho Peng Yoke, Takao Hayashi, Yoshimasa Michiwaki, Cheng-Yih Chen, Vincent H. Malmström, K. V. Sarma, Yvonne Dold-Samplonius, Emilia Calvo, Paul Kunitzsch, Denis Wood, Thomas J. Bassett, Catherine Delano Smith, David Turnbull, Emilie Savage-Smith, Cordell D. K. Yee, Hong-Key Yoon, Joseph E. Schwartzberg, Ahmet T. Karamustafa, David A. King, Kazutaka Unno, Gari Ledyard, Barbara E. Mundy, G. Malcolm Lewis, Gregg Deyoung, Richard Lemay, George Gheverghese Joseph, Paulus Gerdes, Ahmed Djebbar, Salimata Doumbia, Ulrich Libbrecht, James Ritter, Tony Levy, Jan P. Hogendijk, Jean-Claude Martzloff, Kim Yong-Woon, Michael P. Closs, Jens Hoyrup, Robert M. Veatch, Angela Ki Che Leung, Prakash N. Desai, Azim A. Nanji, Richard Bertschinger, Nina L. Etkin, Charles Anyinam, Jingfeng Cai, J. Worth Estes, Bhagwan Dash, Mansour Solyman Al-Said, William D. Johnston, Ruben G. Mendoza, Jay R. Wolter, Ake Hultkrantz, Suliana Siwatibau, Samuel S. Kottek, Viggo Brun, Lawrence Tyler, S. Terry Childs, Hua Jueming, Gregg De Young, A. V. Balasubbramanian, Gray Graffam, William J. Mcpeak, Y. Tzvi Langermann, Connie H. Nobles, Shigehisa Kuriyama, Jehane Ragai, Bernardo Arriaza, and Vicki Cassman

Published
1997
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15. Preface.

Author

Cheng-Yih Chen

Subjects
CHINESE civilization, SCIENTIFIC Revolution, TECHNOLOGICAL innovations
Published
1987

17. Two-tone Set-bells Of Marquis Yi

Author

Joseph Cheng-yih Chen, W-s Tan, Z-m Shu, Joseph Cheng-yih Chen, W-s Tan, and Z-m Shu

Subjects
Bells--China, Music--Acoustics and physics
Abstract

This book is a collection of papers on the set-bells of Marquis Yi to commemorate the 10th anniversary of their discovery. The unearthing of these 5th century bells in 1978 marked one of the most remarkable archeological discoveries in the history of science and technology in Chinese civilization. These bells are two-tone set-bells with textural inscriptions and were cast in chromatical scale over a range of 51/2 octaves. This collection of papers represents the interdisciplinary research initiated by the discovery of the bells over the past ten years.

Published
1994

18. Science And Technology In Chinese Civilisation - Proceedings Of The Workshop Held At The University Of California

Author

Joseph Cheng-yih Chen and Joseph Cheng-yih Chen

Subjects
Technology--China--History, Science--China--History
Abstract

Each paper in this book contributes to our understanding of a specific area and they illustrate a wide range of approaches, methods and concerns. This collection stimulates interactions among scientists, historians and philosophers in the exploration of multicultural tradition of science and technology.

Published
1987

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