CaltechAUTHORS
  A Caltech Library Service

Oxidative Cyclizations in a Nonpolar Solvent Using Molecular Oxygen and Studies on the Stereochemistry of Oxypalladation

Trend, Raissa M. and Ramtohul, Yeeman K. and Stoltz, Brian M. (2005) Oxidative Cyclizations in a Nonpolar Solvent Using Molecular Oxygen and Studies on the Stereochemistry of Oxypalladation. Journal of the American Chemical Society, 127 (50). pp. 17778-17788. ISSN 0002-7863. PMCID PMC2585987. http://resolver.caltech.edu/CaltechAUTHORS:20170216-152155230

[img] PDF - Accepted Version
See Usage Policy.

1500Kb
[img] PDF (Full experimental details and characterization data for all new compounds) - Supplemental Material
See Usage Policy.

1442Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20170216-152155230

Abstract

Oxidative cyclizations of a variety of heteroatom nucleophiles onto unactivated olefins are catalyzed by palladium(II) and pyridine in the presence of molecular oxygen as the sole stoichiometric oxidant in a nonpolar solvent (toluene). Reactivity studies of a number of N-ligated palladium complexes show that chelating ligands slow the reaction. Nearly identical conditions are applicable to five different types of nucleophiles:  phenols, primary alcohols, carboxylic acids, a vinylogous acid, and amides. Electron-rich phenols are excellent substrates, and multiple olefin substitution patterns are tolerated. Primary alcohols undergo oxidative cyclization without significant oxidation to the aldehyde, a fact that illustrates the range of reactivity available from various Pd(II) salts under differing conditions. Alcohols can form both fused and spirocyclic ring systems, depending on the position of the olefin relative to the tethered alcohol; the same is true of the acid derivatives. The racemic conditions served as a platform for the development of an enantioselective reaction. Experiments with stereospecifically deuterated primary alcohol substrates rule out a “Wacker-type” mechanism involving anti oxypalladation and suggest that the reaction proceeds by syn oxypalladation for both mono- and bidentate ligands. In contrast, cyclizations of deuterium-labeled carboxylic acid substrates undergo anti oxypalladation.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/ja055534kDOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja055534kPublisherArticle
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2585987/PubMed CentralArticle
http://pubs.acs.org/doi/suppl/10.1021/ja055534kPublisherSupporting Information
ORCID:
AuthorORCID
Stoltz, Brian M.0000-0001-9837-1528
Additional Information:© 2005 American Chemical Society. Received August 12, 2005; Publication Date (Web): November 15, 2005. The authors wish to thank the NIH-NIGMS (R01 GM65961-01), Bristol-Myers Squibb Company and the American Chemical Society (graduate fellowship to R.M.T.), the University of California TRDRP (postdoctoral fellowship to Y.K.R.), the Dreyfus Foundation, Merck Research Laboratories, Research Corporation, Abbott Laboratories, Pfizer, Amgen, GlaxoSmithKline, Lilly, and Johnson and Johnson for generous financial support. Drs. Eric Ferreira, Jonathan Owen, and Andrew Waltman are acknowledged for helpful discussions.
Funders:
Funding AgencyGrant Number
NIHR01GM65961-01
Bristol-Myers SquibbUNSPECIFIED
American Chemical SocietyUNSPECIFIED
California Tobacco-Related Disease Research ProgramUNSPECIFIED
Camille and Henry Dreyfus FoundationUNSPECIFIED
Merck Research LaboratoriesUNSPECIFIED
Research CorporationUNSPECIFIED
Abbott LaboratoriesUNSPECIFIED
PfizerUNSPECIFIED
AmgenUNSPECIFIED
GlaxoSmithKlineUNSPECIFIED
LillyUNSPECIFIED
Johnson and JohnsonUNSPECIFIED
PubMed Central ID:PMC2585987
Record Number:CaltechAUTHORS:20170216-152155230
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170216-152155230
Official Citation:Oxidative Cyclizations in a Nonpolar Solvent Using Molecular Oxygen and Studies on the Stereochemistry of Oxypalladation Raissa M. Trend, Yeeman K. Ramtohul, and Brian M. Stoltz Journal of the American Chemical Society 2005 127 (50), 17778-17788 DOI: 10.1021/ja055534k
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74395
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:17 Feb 2017 15:49
Last Modified:17 Feb 2017 15:49

Repository Staff Only: item control page