Tetrahedron VoL48, No. ... 4 mmol) and potassium t-butoxide (4 mmol) in THF (15 ml) at -6OC was added a solution of 5-methylpyrimidine (0.28 ... 1. For examples see Barraclough, P., Iyer; M., Lindon; JC and Williams; JM; Terruhedron Lett., 1986, 27,597; Harmenberg, J.; Wahren, B ...