2,2,5,7,8-pentamethylchroman-6-sulphonyl

R. Ramage, J. Green, A.J. Blake, An acid labile arginine derivative for peptide synthesis NG-2,2,5,7,8-pentamethylchroman-6-sulphonyl-L-arginine, Tetrahedron 47(1991)6353-6370. 

R Ramage, I Green. NG-2,2,5,7,8-Pentamethylchroman-6-sulphonyl-L-arginine a new acid labile derivative for peptide synthesis. (Pmc) Tetrahedron Lett 28, 2287, 1987. 

Figure 2.2 Modem solid phase peptide synthesis (Contd.). Most frequently used amino add side chain protecting groups are shown t-BOC tert-bulyloxycarbonyl Trt trityl PMC 2,2,5,7,8-pentamethylchroman-6-sulphonyl PBF 2,2,4,6,7-pentamethyl-dihydrobenzofuran-5-sulphonyl.

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