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Paul A. Keifer
Paul A. Keifer
NMR Spectroscopist (Agilent; Varian); Faculty (Stanford; UNMC)
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Pure absorption gradient enhanced heteronuclear single quantum correlation spectroscopy with improved sensitivity
L Kay, P Keifer, T Saarinen
Journal of the American Chemical Society 114 (26), 10663-10665, 1992
30691992
Ecteinascidins 729, 743, 745, 759A, 759B, and 770: potent antitumor agents from the Caribbean tunicate Ecteinascidia turbinata
KL Rinehart, TG Holt, NL Fregeau, JG Stroh, PA Keifer, F Sun, LH Li, ...
The Journal of Organic Chemistry 55 (15), 4512-4515, 1990
7351990
WET solvent suppression and its applications to LC NMR and high-resolution NMR spectroscopy
SH Smallcombe, SL Patt, PA Keifer
Journal of Magnetic Resonance Series A 117, 295-303, 1995
7271995
Seaweed resistance to microbial attack: a targeted chemical defense against marine fungi
J Kubanek, PR Jensen, PA Keifer, MC Sullards, DO Collins, W Fenical
Proceedings of the National Academy of Sciences 100 (12), 6916-6921, 2003
3392003
Polymer micelle with cross-linked ionic core
TK Bronich, PA Keifer, LS Shlyakhtenko, AV Kabanov
Journal of the American Chemical Society 127 (23), 8236-8237, 2005
3172005
High-resolution 1H NMR in solid-phase organic synthesis
WL Fitch, G Detre, CP Holmes, JN Shoolery, PA Keifer
The Journal of Organic Chemistry 59 (26), 7955-7956, 1994
2961994
Bioactive bromopyrrole metabolites from the Caribbean sponge Agelas conifera
PA Keifer, RE Schwartz, MES Koker, RG Hughes Jr, D Rittschof, ...
The Journal of Organic Chemistry 56 (9), 2965-2975, 1991
2761991
A comparison of NMR spectra obtained for solid-phase-synthesis resins using conventional high-resolution, magic-angle-spinning, and high-resolution magic-angle-spinning probes
PA Keifer, L Baltusis, DM Rice, AA Tymiak, JN Shoolery
Journal of Magnetic Resonance, Series A 119 (1), 65-75, 1996
2411996
Influence of Resin Structure, Tether Length, and Solvent upon the High-Resolution (1) H NMR Spectra of Solid-Phase-Synthesis Resins.
PA Keifer
The Journal of Organic Chemistry 61 (5), 1558-1559, 1996
1991996
Bioactive compounds from aquatic and terrestrial sources
KL Rinehart, TG Holt, NL Fregeau, PA Keifer, GR Wilson, TJ Perun Jr, ...
Journal of natural products 53 (4), 771-792, 1990
1981990
An NMR method to identify nondestructively chemical compounds bound to a single solid-phase-synthesis bead for combinatorial chemistry applications
SK Sarkar, RS Garigipati, JL Adams, PA Keifer
Journal of the American Chemical Society 118 (9), 2305-2306, 1996
1841996
Renillafoulins, antifouling diterpenes from the sea pansy Renilla reniformis (Octocorallia)
PA Keifer, KL Rinehart Jr, IR Hooper
The Journal of Organic Chemistry 51 (23), 4450-4454, 1986
1481986
Milnamide A, an unusual cytotoxic tripeptide from the marine sponge Auletta cf. constricta
P Crews, JJ Farias, R Emrich, PA Keifer
The Journal of Organic Chemistry 59 (11), 2932-2934, 1994
1091994
High-resolution NMR techniques for solid-phase synthesis and combinatorial chemistry
PA Keifer
Drug Discovery Today 2 (11), 468-478, 1997
1061997
Direct-injection NMR (DI-NMR): a flow NMR technique for the analysis of combinatorial chemistry libraries
PA Keifer, SH Smallcombe, EH Williams, KE Salomon, G Mendez, ...
Journal of Combinatorial Chemistry 2 (2), 151-171, 2000
892000
The utility of pulsed-field-gradient HMBC for organic structure determination
PL Rinaldi, PA Keifer
Journal of Magnetic Resonance, Series A 108 (2), 259-262, 1994
821994
NMR tools for biotechnology
PA Keifer
Current opinion in biotechnology 10 (1), 34-41, 1999
781999
90° pulse width calibrations: how to read a pulse width array
PA Keifer
Concepts in Magnetic Resonance: an Educational Journal 11 (3), 165-180, 1999
731999
New methods for obtaining high-resolution NMR spectra of solid-phase synthesis resins, natural products, and solution-state combinatorial chemistry libraries
PA Keifer
Drugs of the Future 23 (3), 301-319, 1998
691998
Identification of a novel glycosaminoglycan core-like molecule I: 500 MHz 1H nmr analysis using a nano-nmr probe indicates the presence of a terminal α-galnac residue capping 4 …
A Manzi, PV Salimath, RC Spiro, PA Keifer, HH Freeze
Journal of Biological Chemistry 270 (16), 9154-9163, 1995
691995
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Artiklar 1–20