In this proposal, a program directed towards the development of novel and synthetically valuable stereoselective catalytic reductive condensations reactions is described. In our initial studies we have developed the catalytic enantioselective reductive aldol reaction which converts commercially available silanes, acrylates and aldehydes to aldol adducts. The reductive aldol reaction holds an advantage over auxiliary-based and Mukaiyama aldol processes in that the reductive aldol reaction directly provides silyl protected aldol adducts, proceeds at room temperature and operates directly on commercially available materials. In the proposed research, we aim to develop related processes that have similar operational simplicity but which afford reaction products which are not readily available by current catalytic asymmetric processes. Since non-oxophilic late transition metal catalysts are used for these reactions, we suspect that the reductive condensation processes we develop may proceed at exceptionally low catalyst loading (less than 0.05 mol percent) and not suffer from complications involving catalyst poisoning by polyoxygenated substrates.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM064451-02
Application #
6604742
Study Section
Medicinal Chemistry Study Section (MCHA)
Program Officer
Schwab, John M
Project Start
2002-07-01
Project End
2005-06-30
Budget Start
2003-07-01
Budget End
2004-06-30
Support Year
2
Fiscal Year
2003
Total Cost
$253,921
Indirect Cost
Name
University of North Carolina Chapel Hill
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
608195277
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
Potter, Bowman; Edelstein, Emma K; Morken, James P (2016) Modular, Catalytic Enantioselective Construction of Quaternary Carbon Stereocenters by Sequential Cross-Coupling Reactions. Org Lett 18:3286-9
Zhang, Liang; Lovinger, Gabriel J; Edelstein, Emma K et al. (2016) Catalytic conjunctive cross-coupling enabled by metal-induced metallate rearrangement. Science 351:70-4
Eno, Meredith S; Lu, Alexander; Morken, James P (2016) Nickel-Catalyzed Asymmetric Kumada Cross-Coupling of Symmetric Cyclic Sulfates. J Am Chem Soc 138:7824-7
Yu, Zhiyong; Eno, Meredith S; Annis, Alexandra H et al. (2015) Enantioselective Hydroformylation of 1-Alkenes with Commercial Ph-BPE Ligand. Org Lett 17:3264-7
Ardolino, Michael J; Morken, James P (2015) Branched/linear selectivity in palladium-catalyzed allyl-allyl cross-couplings: The role of ligands. Tetrahedron 71:6409-6413
Ely, Robert J; Yu, Zhiyong; Morken, James P (2015) Diastereoselective Ni-catalyzed 1,4-hydroboration of chiral dienols. Tetrahedron Lett 56:3402-3405
Ardolino, Michael J; Morken, James P (2014) Congested C-C bonds by Pd-catalyzed enantioselective allyl-allyl cross-coupling, a mechanism-guided solution. J Am Chem Soc 136:7092-100
Le, Hai; Batten, Amanda; Morken, James P (2014) Catalytic stereospecific allyl-allyl cross-coupling of internal allyl electrophiles with AllylB(pin). Org Lett 16:2096-9
Schuster, Christopher H; Coombs, John R; Kasun, Zachary A et al. (2014) Enantioselective carbocycle formation through intramolecular Pd-catalyzed allyl-aryl cross-coupling. Org Lett 16:4420-3
Yu, Zhiyong; Ely, Robert J; Morken, James P (2014) Synthesis of (+)-discodermolide by catalytic stereoselective borylation reactions. Angew Chem Int Ed Engl 53:9632-6

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