Triazolinone ring formation in tert-butanol (TRIAZOLINONE RING FORMATION IN TERT-BUTANOL)

摘要

The present invention provides aryl hydrazine of the general formula (a) with (i) C ₁ -C ₃ aldehyde, (ii) cyanate and weak organic acid, and It relates to a process for the preparation of aryl triazolinones of the general formula (b), which comprises sequentially treating;;Wherein R is lower alkyl; X is independently halogen, lower alkyl, nitro, hydroxy, -NHSO ₂ R ', -N (SO ₂ R') ₂ or -N (R ') SO ₂ R', where R 'is lower alkyl, n is an integer of 0-3.