作者:Kyle A. Coppola、Joseph W. Testa、Emily E. Allen、Bianca R. Sculimbrene
DOI:10.1016/j.tetlet.2014.05.047
日期:2014.7
We report a method for the Lewis acid catalyzed phosphorylation of dials with pyrophosphates. Titanium alkoxides were found to be effective catalysts in the selective mono-phosphorylation for a range of dials. Dials of varying chain lengths and substituents were screened, to study the factors that influence mono-versus di-phosphorylation. It was discovered that 2-alkyl-2-amino-1,3-propanediols can be selectively mono-phosphoiylated in up to 97% isolated yield. This structural core is mono-phosphorylated in numerous immunomodulating compounds including the FDA-approved drug, FTY720.[GRAPHICS](C) 2014 Elsevier Ltd. All rights reserved.