All articles by Ulf Ragnarsson

26 articles

Articles in volume 17 (1963)

Syntheses of three Xylocaine(R) Analogues. Steric Effects in the Reaction between 2,6-Dimethylphenyllithium and Epichlorohydrin.

Löfgren, Nils; Ragnarsson, Ulf; Sjöberg, Kjell

Pages: 1252-1261.

DOI number: 10.3891/acta.chem.scand.17-1252
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Articles in volume 24 (1970)

Reactivity of p-Nitrophenyl Esters in Solid Phase Peptide Synthesis.

Karlsson, Sune; Lindeberg, Gunnar; Ragnarsson, Ulf

Pages: 337-338.

DOI number: 10.3891/acta.chem.scand.24-0337
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Removal of t-Butyloxycarbonyl Groups in Solid Phase Peptide Synthesis.

Karlsson, Sune; Lindeberg, Gunnar; Porath, Jerker; Ragnarsson, Ulf

Pages: 1010-1014.

DOI number: 10.3891/acta.chem.scand.24-1010
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Amino Group Protection in Solid Phase Peptide Synthesis.

Ragnarsson, Ulf; Karlsson, Sune; Lindeberg, Gunnar

Pages: 2821-2825.

DOI number: 10.3891/acta.chem.scand.24-2821
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Note on the Use of Active Esters in Combination with 1,2,4-Triazole in Solid Phase Peptide Synthesis.

Ragnarsson, Ulf; Lindeberg, Gunnar; Karlsson, Sune

Pages: 3079-3080.

DOI number: 10.3891/acta.chem.scand.24-3079
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Articles in volume 25 (1971)

Studies on the Coupling Step in Solid Phase Peptide Synthesis. Some Preliminary Results from Competition Experiments.

Ragnarsson, Ulf; Karlsson, Sune; Sandberg, Bengt

Pages: 1487-1489.

DOI number: 10.3891/acta.chem.scand.25-1487
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Articles in volume 26 (1972)

A Simplified Procedure for the Preparation of t-Butyloxycarbonyl and Similar N-Protected Amino Acid Derivatives.

Ragnarsson, Ulf; Karlsson, Sune M.; Sandberg, Bengt E.

Pages: 2550-2551.

DOI number: 10.3891/acta.chem.scand.26-2550
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Articles in volume 28b (1974)

Synthesis of Bradykinin by Fragment Condensation on a Solid Support.

Karlsson, Sune M.; Ragnarsson, Ulf

Pages: 376-378.

DOI number: 10.3891/acta.chem.scand.28b-0376
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Articles in volume 33b (1979)

New Activating and Coupling Agents for Formation of Amide and Peptide Bonds.

Davidovitch, Yuri A.; Ragnarsson, Ulf

Pages: 311-312.

DOI number: 10.3891/acta.chem.scand.33b-0311
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Improved Preparation of N-(Phenylisopropyloxycarbonyl) Amino Acids from the Corresponding Fluoroformate.

Franzén, Henry; Ragnarsson, Ulf

Pages: 690-692.

DOI number: 10.3891/acta.chem.scand.33b-0690
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Articles in volume 39b (1985)

Protected Homocysteine Peptides as Precursors of Labelled Methionine Peptides. Application in Preparation of Methionine-Enkephalin.

Någren, Kjell; Långström, Bengt; Ragnarsson, Ulf

Pages: 157-161.

DOI number: 10.3891/acta.chem.scand.39b-0157
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Synthesis, Antidiuretic and Pressor Activities of [Arginine4]Arginine-Vasopressin and Two Related Analogues.

Rekowski, Piotr; Lammek, Bernard; Melin, Per; Ragnarsson, Ulf; Kupryszewski, Gotfryd

Pages: 453-457.

DOI number: 10.3891/acta.chem.scand.39b-0453
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Articles in volume 40b (1986)

Structure-Activity Relationships in Distamycin A Analogues: Effect of Alkyl Groups on the Pyrrole Nitrogen at the Non-amidine End of the Molecule Combined with Methyl Elimination in the Following Ring.

Grehn, Leif; Ragnarsson, Ulf; Datema, Roelf

Pages: 145-151.

DOI number: 10.3891/acta.chem.scand.40b-0145
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A Simple Method for tert-Butoxycarbonylation of Amides.

Grehn, Leif; Gunnarsson, Kerstin; Ragnarsson, Ulf

Pages: 745-750.

DOI number: 10.3891/acta.chem.scand.40b-0745
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Articles in volume 41b (1987)

Selective Cleavage of Boc-acylamides. A Novel Approach to Deacylation of Carboxamides.

Grehn, Leif; Gunnarsson, Kerstin; Ragnarsson, Ulf

Pages: 18-23.

DOI number: 10.3891/acta.chem.scand.41b-0018
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Articles in volume 43 (1989)

Facile Synthesis of Monoacetylated Spermidines, Illustrating Selective Deacetylation and Application of a Common Precursor.

Almeida, M. Lurdes S.; Grehn, Leif; Ragnarsson, Ulf

Pages: 990-994.

DOI number: 10.3891/acta.chem.scand.43-0990
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Articles in volume 44 (1990)

The Preparation and Properties of Partially Protected 4-Amino-1-methylimidazole-2-carboxylic Acids to be Used as Intermediates in the Synthesis of Analogues of Distamycin A.

Grehn, Leif; Ding, Lu; Ragnarsson, Ulf

Pages: 67-74.

DOI number: 10.3891/acta.chem.scand.44-0067
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The Preparation of Partially Protected 3-Amino-1-methylpyrazole-5-carboxylic Acids to be Used as Intermediates in the Synthesis of Analogues of Distamycin A.

Ding, Lu; Grehn, Leif; Ragnarsson, Ulf

Pages: 75-81.

DOI number: 10.3891/acta.chem.scand.44-0075
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Preparation and Properties of Nalpha-Di-tert-Butoxycarbonyl Amino Acids. Applicability in the Synthesis of Leu-Enkephalin.

Gunnarsson, Kerstin; Ragnarsson, Ulf

Pages: 944-951.

DOI number: 10.3891/acta.chem.scand.44-0944
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Articles in volume 47 (1993)

Synthesis and Application of N,N-Bis-(1-adamantyloxycarbonyl) Amino Acids.

Nyasse, Barthélémy; Ragnarsson, Ulf

Pages: 374-379.

DOI number: 10.3891/acta.chem.scand.47-0374
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Synthesis, Properties and Use of Nitridotricarbonic Acid Tri-tert-Butyl Ester.

Degerbeck, Fredrik; Grehn, Leif; Ragnarsson, Ulf

Pages: 896-898.

DOI number: 10.3891/acta.chem.scand.47-0896
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Synthesis and Spectroscopic Properties of 13C- and 15N-Labelled tert-Butoxycarbonylglycines.

Grehn, Leif; Pehk, Tönis; Ragnarsson, Ulf

Pages: 1107-1111.

DOI number: 10.3891/acta.chem.scand.47-1107
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Articles in volume 48 (1994)

Synthesis and Antiviral Activity of Three Pyrazole Analogues of Distamycin A.

Ding, Lu; Grehn, Leif; De Clercq, Erik; Andrei, Graciela; Snoeck, Robert; Balzarini, Jan; Fransson, Bengt; Ragnarsson, Ulf

Pages: 498-505.

DOI number: 10.3891/acta.chem.scand.48-0498
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Articles in volume 49 (1995)

Synthesis of 15N-Labelled Leu-Enkephalins.

Degerbeck, Fredrik; Fransson, Bengt; Grehn, Leif; Ragnarsson, Ulf

Pages: 149-151.

DOI number: 10.3891/acta.chem.scand.49-0149
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Articles in volume 52 (1998)

Chemoselective Substitution in 4-Toluenesulfonamides and Carbamates by Di-tert-butyl Dicarbonate in the Presence of 4-Dimethylaminopyridine.

Grehn, Leif; Ragnarsson, Ulf

Pages: 627-630.

DOI number: 10.3891/acta.chem.scand.52-0627
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Articles in volume 53 (1999)

Synthesis of Substituted Hydrazines from Triprotected Precursors.

Mäeorg, Uno; Pehk, Tönis; Ragnarsson, Ulf

Pages: 1127-1133.

DOI number: 10.3891/acta.chem.scand.53-1127
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