5'-O-Dimethoxytrityl-3'-O-succinatothymidine is covalently, linked to long chain alkyl amine controllled pore glass support (LCAA-CPG) via an o-nitrobenzyl group. The modified solid phase synthesis support is compatible with standard automated phosphoramidite based oligonucleotide synthesis. Cleavage from the solid support is achieved via CuSO4 filtered photolysis. Isolated yields are comparable with those obtained from other oligonucleotide supports.