| 1. |
- Baker, T. C., et al.
(författare)
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Isolation, identification and synthesis of sex pheromone components of the carob moth, Ectomyelois ceratoniae
- 1989
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 30:22, s. 2901-2902
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Tidskriftsartikel (refereegranskat)abstract
- The sex pheromone of females of the carob moth, Ectomyelois ceratoniae, was identified to be a mixture of (Z,E)-9,11,13-tetradecatrienal, (Z,E)-9,11-tetradecadienal and (Z)-9-tetradecenal in the ratio of 10:1:1. A synthetic blend proved to be attractive. GC/EAD + GC/MS investigations showed (Z,E)-9,11,13-tetradecatrienal, (Z,E)-9,11-tetradecadienal and (Z)-9-tetradecenal to be the sex pheromone of the carob moth. Blends of synthetic compounds are active.
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| 2. |
- Bhattacharyya, Tapes, et al.
(författare)
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An efficient and convergent route towards water-soluble, chiral and amphiphilic macrocycles
- 2001
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 42:15, s. 2873-2875
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Tidskriftsartikel (refereegranskat)abstract
- A practical procedure for the synthesis of water-soluble, chiral and amphiphilic macrocyclic molecules is described. Acylation of p-xylylene diamine with Fmoc-protected glycine and aspartic acid, followed by removal of the Fmoc moiety afforded amino acid:p-xylene conjugates as free diamines. These diamines were converted to symmetrical and unsymmetrical macrocycles via stepwise urea formation using p-nitrophenyl chloroformate.
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| 3. |
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| 4. |
- Ellervik, Ulf
(författare)
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9-Anthraldehyde acetals as protecting groups.
- 2003
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 44:11, s. 2279-2281
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Tidskriftsartikel (refereegranskat)abstract
- Anthraldehyde acetals can be introduced regioselectively to carbohydrates in high yields. Advantages over conventional acetal protecting groups are increased crystallinity and strong absorbance and fluorescence which facilitate purification and reaction monitoring. The anthraldehyde acetals can be deprotected selectively in the presence of benzylidene acetals and can be cleaved regioselectively to yield 6-O-(9-anthracenyl)methyl ethers.
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| 5. |
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| 6. |
- Eriksson Bajtner, Johan, et al.
(författare)
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Synthesis of podoscyphic acid
- 2002
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 43:5, s. 891-893
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Tidskriftsartikel (refereegranskat)abstract
- Podoscyphic acid 1, a fungal metabolite inhibiting RNA-directed DNA polymerises, was synthesised in four steps starting from dodecanal. The concluding ester hydrolysis of 4 was not feasible with chemical reagents, only enzymatic hydrolysis was mild enough to release the highly reactive natural product in good yields. (C) 2002 Elsevier Science Ltd. All rights reserved.
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| 7. |
- Grundberg, Hans, et al.
(författare)
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Conversion of 2-(trimethylsilyl)ethyl sulfides into thioesters
- 1999
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 40:9, s. 1811-1814
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Tidskriftsartikel (refereegranskat)abstract
- Treatment of 2-(trimethylsilyl)ethyl sulfides with a carboxylic acid chloride and AgBF4 in CH2Cl2 furnishes the corresponding thioesters in high yields and purities. The conversion of 2-(trimethylsilyl)ethyl sulfides into synthetically versatile thioesters allows such sulfides to be used as sulfhydryl protective groups, since such sulfides are easily prepared and are stable towards many reaction conditions encountered in organic syntheses.
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| 8. |
- Jacobsson, Mårten, et al.
(författare)
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Synthesis of naphthoxylosides on solid support
- 2002
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 43:37, s. 6549-6552
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Tidskriftsartikel (refereegranskat)abstract
- In order to investigate the selective antiproliferative effects shown by 2-(6-hydroxynaphthyl)-beta-D-xylopyranoside the 14 possible beta-D-xylopyranosidic compounds were synthesized on solid support. An aminomethylated polystyrene resin was converted into an acid chloride resin and then esterified using dihydroxynaphthalene. The free hydroxy group was then xylosylated Under BF3.OEt2 mediated conditions. The xyloside was deprotected and simultaneously cleaved off the resin Using NaOMe/MeOH. Final purification using reverse phase HPLC gave the pure xylosides in 6-42% yield with Virtually no formation of alpha-xylosides. (C) 2002 Elsevier Science Ltd. All rights reserved.
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| 9. |
- Kempe, Maria, et al.
(författare)
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Receptor binding mimetics: a novel molecularly imprinted polymer
- 1995
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Ingår i: Tetrahedron Letters. - 0040-4039. ; 36:20, s. 3563-3566
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Tidskriftsartikel (refereegranskat)abstract
- A novel molecularly imprinted polymer was prepared by copolymerization of trimethylolpropane trimethacrylate (1) and methacrylic acid (3) in the presence of a dipeptide acting as the template. The recognition capability of the synthetic receptor-like binding sites produced in the polymer network for the peptide was demonstrated by using the polymer as a chiral stationary phase in HPLC. The polymer was superior to previously reported molecularly imprinted polymers in that unusually high racemic resolution and load capacity were demonstrated.
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| 10. |
- Koch, T., et al.
(författare)
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PNA-Peptide Chimerae
- 1995
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Ingår i: Tetrahedron Letters. - 0040-4039 .- 1873-3581. ; 36:38, s. 6933-6936
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Tidskriftsartikel (refereegranskat)abstract
- Radioactive labelling of PNA has been performed try linking a peptide segment to the PNA which is substrate for protein kinase A. The enzymatic phosphorylation proceeds in almost quantitative yields.
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