反应详情

Acetonitrile (HPLC gradient-grade), divinylbenzene (synthesis grade), methanol (HPLC gradient-grade), styrene (synthesis grade), and tetrahydrofuran (analytical reagent grade) were obtained from Merck (Darmstadt, Germany). Styrene and divinylbenzene were distilled before use. Acetic acid (analytical reagent grade), azobisisobutyronitrile (synthesis grade), decanol (synthesis grade), and triethylamine (p.a.) were purchased from Fluka (Buchs, Switzerland). A 1.0 M stock solution of triethylammonium acetate (TEM) was prepared by dissolving equimolar amounts of triethylamine and acetic acid in water. A 0.50 M stock solution of triethylammonium bicarbonate (TEAB) was prepared by passing carbon dioxide gas (AGA, Vienna, Austria) through a 0.50 M aqueous solution of triethylamine at 5° C. until pH 8.4–8.9 was reached. For preparation of all aqueous solutions, high-purity water (Epure, Barnstead Co., Newton, Mass., USA) was used. The standards of phosphorylated and non-phosphorylated oligodeoxynucleotides ((dT)12-18, p(dT)12-18, p(dT)19-24, p(dT)25-30) were purchased as sodium salts from Pharmacia (Uppsala, Sweden) or Sigma-Aldrich (St. Louis, Mo., USA). The synthetic oligodeoxynucleotides (dT)24 (Mr 7,238.71), a 5′-dimethoxytritylated 5-mer (DMTr-ATGCG, Mr 1805.42), and an 80-mer (Mr 24,527.17):

1. distillationStyrene and divinylbenzene were distilled before use
2. customA 1.0 M stock solution of triethylammonium acetate (TEM) was prepared
3. customat 5° C.