40733-28-6Relevant academic research and scientific papers
A Practical Method for Regioselective 5′-O-tert-Butyldimethylsilyl Deprotection of Persilylated Nucleosides by Methanolic Phosphomolybdic Acid
Huang, Hua-Shan,Kong, Rui,Zheng, Xiu-An,Chen, Wei-Jie,Han, Shuai-Bo,Zeng, De-Yun,Gong, Shan-Shan,Sun, Qi
supporting information, p. 2437 - 2443 (2018/11/23)
In nucleoside/nucleotide chemistry, the regioselective cleavage of 5′-O-TBS groups of persilylated nucleosides is a desired approach for structural functionalization at the 5′-position. However, efficient and practical methods for this purpose are still limited. In our research, we found that homogeneous methanolic phosphomolybdic acid (PMA) efficiently catalyzes the regioselective deprotection of 5′- O -TBS groups of a diversity of persilylated nucleoside substrates and can be applied in practical synthesis at scales of up to 15 g. 31 P NMR results indicated that an anion cluster forms and the Lewis acidity of homogeneous PMA is organic-solvent dependent. The efficacy and pronounced regioselectivity of methanolic PMA occurs as a result of a lowering of the Lewis acid strength upon solvation of the molybdophosphate anions.
An improved procedure for the synthesis of vinylphosphonate-linked nucleic acids
Abbas, Sahar,Hayes, Christopher J.
, p. 4513 - 4517 (2007/10/03)
The synthesis of a range of 5'-deoxy-5'-methylidene phosphonate- containing thymidine dimers has been achieved using a palladium-catalysed cross coupling reaction as a key step. The optimised reaction conditions comprising of palladium acetate, 1,1'-bis(diphenylphosphino)ferrocene and propylene oxide in THF were found to couple a range of H-phosphonates and vinyl bromide 3 in fair to excellent yield. (C) 2000 Elsevier Science Ltd.
