6-Methyl-2-thiouracil (1) reacts with Wittig-Horner (2a-e) reagents to give
the new products 3, 4, 6, 7 and 9 along with the alkylated derivatives 5,
8 and 10. When 1 was treated with 2e and/or 2f, the alkylated compound 10 i
s the sole reaction prduct. Possible reaction mechanism are considered and
the structural assignments are based on compatible analytical and spectrosc
opic results.