... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 46, Issue 50, 12 December 2005, Pages 8749–8752. Cover image Cover image. Solid-phase synthesis of pyrido[2,3-d]pyrimidin-7-ones. ... Tetrahedron Lett., 44 (2003), pp. 4567–4570. ...