A new route to 1,4-disubstituted 5-thioxoperhydroimidazo[4,5-d]imidazol-2-ones
摘要:
1,4-Disubstituted 5-thioxoperhydroimidazo[4,5-d]imidazol-2-ones were prepared by one-pot criss-cross cycloaddition reactions of 1,4-disubstituted 1,4-diazabuta-1,3-dienes with HNCS and HNCO generated in situ from potassium salts by acetic acid. (C) 2002 Elsevier Science Ltd. All rights reserved.