Rapid synthesis of oligodeoxynucleotides by using N-methylimidazole as a condensation catalyst. Syntheses of dodecanucleotides corresponding to complementary deoxyribonucleic acid of the tetrapeptide fragments of cholecystokinin-pancreozymin and vasoactive intestinal peptide.
作者:TOSHIAKI WAKABAYASHI、SHINRO TACHIBANA
DOI:10.1248/cpb.30.3951
日期:——
It has been found that N-methylimidazole (MeIm) activates stable condensing reagents such as 2, 4, 6-triisopropylbenzenesulfonyl-4-nitroimidazolide (TPSNI) and mesitylenesulfonyl-4-nitroimidazolide (MSNI). Fully protected trinucleotides which could serve as key intermediates were synthesized by using MeIm and TPSNI or MSNI. These trinucleotides were utilized in the syntheses of the dodecamers, dCATCCACCCCAT and dAGCCATCTGCTT, which correspond to the specific tetrapeptides of cholecystokininpancreozymin and vasoactive intestinal peptide.
研究发现,N-甲基咪唑(MeIm)能够活化稳定的缩合剂,如2,4,6-三异丙基苯磺酰基-4-硝基咪唑化锂(TPSNI)和间三甲苯磺酰基-4-硝基咪唑化锂(MSNI)。通过使用MeIm和TPSNI或MSNI,合成了全保护的三核苷酸,这些三核苷酸可作为关键中间体。这些三核苷酸被用于合成十二聚体,dCATCCACCCCAT和dAGCCATCTGCTT,它们分别对应于胆囊收缩素-胰酶素和血管活性肠肽的特异性四肽序列。