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> Resins for Peptide Synthesis
> Hydroxymethyl Resin
Hydroxymethyl Resin
|
Catalog # |
Cross Linker (DVB) |
Particle Size
(mesh) |
Loading
(mmol/g) |
Price (US $) |
100 g |
500 g |
1 kg |
150801
150802
150803
150804
150805 |
1%
1%
1%
1%
1% |
100-200
100-200
200-400
200-400
70-90 |
0.5-1.5
1.5-3.0
0.5-1.5
1.5-3.0
0.5-1.5 |
250.00
270.00
250.00
270.00
270.00 |
679.00
765.00
679.00
765.00
765.00 |
1,200.00
1,345.00
1,200.00
1,345.00
1,345.00 |
Hydroxymethyl resin is ideal for the solid phase immobilization of carboxylic acid. Less cross-linking is observed than that with Merrifield resin during the attachment of diacids [1]. Reaction with a suitable phosgene equivalent converts this resin to a support suitable for the immobilization of amines [2]. The carbamate linker of hydroxymethyl polystyrene can be used as an equivalent of Cbz, is stable to a wide range of acidic, basic and reductive conditions. Fisher indole synthesis and Pictet-Spengler cyclization on solid support, which require 70ºC in acetic acid with zinc chloride and 10% TFA in dichloromethane, respectively, were successfully carried out using this linker [3]. Methyl esters can be produced by transesterification with MeONa [4] or Ti(OEt)4/C2H5CO2Me [5]. Carboxamides are also accessible via Lewis acid catalyzed aminolysis [6]. Highly pure ketopiperazines can be produced by the resin-bound alpha-amino acids [7].
References
[1] J. M. Goldwasser, et al., Can. J. Chem., 1978, 56, 1562
[2] D. J. Burdick, et al., Tetrahedron Lett., 1993, 34, 2589
[3] L. H. Yang, et al., Tetrahedron Lett., 2000, 41, 6981
[4] R. Frenette, et al., Tetrahedron Lett., 1994, 35, 9177
[5] L. T. Tietze & A.Steinmetz, Angew. Chem. Int. Ed. Engl., 1996, 35, 651
[6] D. R. Barn, et al., Tetrahedron Lett., 1996, 37, 3213
[7] C. Hulme, et al., Tetrahedron Lett., 2000, 41, 1509 |
