Abstract
Studies directed toward the process research, development, and scale-up preparation of the potential αvβ3 integrin antagonist 1 are described. A convergent approach is detailed wherein tetrahydropyrimidine hydroxybenzoic acid 2 is linked to the β-amino acid ester 3 via a diisoproylcarbodiimide, catalytic HOBt coupling reaction. Saponification of the resulting ethyl ester, isolation of the corresponding zwitterion, H3PO4 salt formation, crystallization, and acetonitrile-to-acetone exchange give rise to 1 as a crystalline monohydrate in 67% overall yield from 4.
| Original language | English |
|---|---|
| Pages (from-to) | 1088-1093 |
| Number of pages | 6 |
| Journal | Organic Process Research and Development |
| Volume | 13 |
| Issue number | 6 |
| DOIs | |
| State | Published - Nov 20 2009 |
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