Novel methods for the preparation of monomethoxytrityl (Mmt) protected
aminoethylglycine building blocks and dimethoxytrityl (Dmt) protected
hydroxyethylglycine derivatives useful for the synthesis of polyamide
nucleic acids (PNAs) and PNA/DNA chimeras are described. The protecti
ng group strategy employed for PNA monomer synthesis produces easily i
solable intermediates, minimizes chromatographic purification, and is
suitable for large-scale monomer synthesis. (C) 1997 Elsevier Science
Ltd.