Organocatalyzed C–C Ring Construction: The Hayashi Synthesis of PGE1 Me Ester

2015 ◽  
Author(s):  
Douglass F. Taber
Keyword(s):  
San Antonio ◽  
Good Control ◽  
Synthetic Method ◽  
Unsaturated Aldehyde ◽  
University Of Texas ◽  
Quaternary Center ◽  
Princeton University ◽  
Amino Acid Precursor ◽  
The University ◽  
Acid Precursor

Xiaohua Liu and Xiaoming Feng of Sichuan University devised (J. Org. Chem. 2013, 78, 6322) a catalyst that mediated the addition of the ylide 2 to the enone 1 to give 3. Peng-fei Xu of Lanzhou University found (Chem. Commun. 2013, 49, 4625) that the vinyl pyrrole 4 was sufficiently nucleophilic to add to 5, leading to the cyclobutane 6. Albert Moyano of the Universitat de Barcelona added (Eur. J. Org. Chem. 2013, 3103) 8 to the unsaturated aldehyde 7 to give the β-amino acid precursor 9. Eugenia Marqués-López and Mathias Christmann, now at Freie Universität Berlin effected (Synthesis 2013, 45, 1016) the intramolecular Michael cyclization of 10 to give 11. Delong Liu and Wanbin Zhang of Shanghai Jiao Tong University showed (Synthesis 2013, 45, 1612) that 12 and 13 could be combined to give the cyclopentane 14. Ismail Ibrahem and Armando Córdova of Mid Sweden University combined (Angew. Chem. Int. Ed. 2013, 52, 6050) 15 and 16 to give 17, with good control of the quaternary center. Kamal Nain Singh of Panjab University prepared (Synthesis 2013, 45, 1406) a proline-derived sulfoxide that mediated the addition of cyclohexanone 18 to 19. Intramolecular aldehyde alkylation is underdeveloped as a synthetic method. David W.C. MacMillan of Princeton University established (J. Am. Chem. Soc. 2013, 135, 9358) a single-electron transfer variant, cyclizing 21 to 22. Arianna Quintavalla of the University of Bologna effected (Adv. Synth. Catal. 2013, 355, 938) the double addition of nitromethane 24 to 23 to give 25. John Cong-Gui Zhao of the University of Texas at San Antonio reported (Chem. Eur. J. 2013, 19, 1666; J. Org. Chem. 2013, 78, 4153) parallel results (not pictured) with aryl enones as the acceptors. Bor-Cherng Hong of the National Chung Cheng University condensed (Eur. J. Org. Chem. 2013, 2472) 26 with the alcohol 27 to give 28. Again, good control of the quaternary center was observed. Marc C. Kimber of Loughborough University used (J. Org. Chem. 2013, 78, 3476) an organocatalyst to rearrange the prochiral endoperoxide 29 to the hydroxy enone, to which malonate 30 was added to give 31.

Examples of Academic Support Systems to Improve Student Success

2006 ◽  
Author(s):  
Amir Karimi
Keyword(s):  
Student Success ◽  
Student Retention ◽  
Support Systems ◽  
San Antonio ◽  
Academic Support ◽  
Student Attrition ◽  
University Of Texas ◽  
Student Demographics ◽  
Underlying Causes ◽  
The University

The University of Texas at San Antonio (UTSA) has implemented a number of academic support systems to address obstacles to student success and to improve student retention. This paper describes the student demographics at UTSA, provides tracking data on student enrollment and retention, and includes discussion of the underlying causes of student attrition. It will describe some of the programs that are implemented to improve student success. Data is provided to measure the level of success of some of the programs that have implemented for the student success.

COCORP: Laramie Range Area, Wyoming

Geophysics ◽  
1981 ◽  
Vol 46 (11) ◽  
pp. 1618-1618 ◽  
Author(s):  
S. Kaufman
Keyword(s):  
Cost Of Reproduction ◽  
National Academy Of Sciences ◽  
University Of Texas ◽  
Cornell University ◽  
University Of Houston ◽  
Princeton University ◽  
Laramie Range ◽  
The Cost ◽  
The University ◽  
The U.S

The Consortium for Continental Reflection Profiling (COCORP) announces the availability of the data package and tapes for the Laramie Range area, Wyoming, for the cost of reproduction. The COCORP operation is part of the U.S. Geodynamics Project sponsored by the National Academy of Sciences and funded by the National Science Foundation. The executive committee of the consortium consists of members from Cornell University, University of Houston, Princeton University, the University of Texas at Austin, the University of Wisconsin, and the U.S. Geological Survey. Cornell University is the operating institution.

COCORP Oklahoma Area, Part I

Geophysics ◽  
1981 ◽  
Vol 46 (2) ◽  
pp. 217-217 ◽  
Author(s):  
S. Kaufman
Keyword(s):  
Cost Of Reproduction ◽  
National Academy Of Sciences ◽  
Crust And Upper Mantle ◽  
University Of Texas ◽  
Cornell University ◽  
University Of Houston ◽  
Princeton University ◽  
The Cost ◽  
The University ◽  
The U.S

The Consortium for Continental Reflection Profiling (COCORP) announces the availability of the data package and tapes for the Oklahoma area, part I, for the cost of reproduction. These data were obtained by COCORP who are applying sophisticated, continuous seismic reflection techniques to the solution of geologic problems of the earth's crust and upper mantle. The operation is part of the U.S. Geodynamics Project sponsored by the National Academy of Sciences and funded by the National Science Foundation. The executive committee of the consortium consists of members from Cornell University, University of Houston, Princeton University, the University of Texas at Austin, and the U.S. Geological Survey. Cornell University is the operating institution.

Community Through Constructive Learning

2011 ◽  
pp. 447-459
Author(s):  
Patricia McGee ◽  
Misty Sailors ◽  
Lucretia Fraga
Keyword(s):  
Student Engagement ◽  
San Antonio ◽  
Faculty Engagement ◽  
Learning Approach ◽  
Community Based ◽  
Constructive Learning ◽  
University Of Texas ◽  
Initial Implementation ◽  
The University

This case study illustrates a community-based constructive learning approach to ePortfolio development, and the subsequent phenomena and outcomes that came from the initial implementation. The authors discuss why and how an ePortfolio system was chosen, as well as faculty engagement, student engagement, and recommendations to others based on the University of Texas at San Antonio experience.

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