A facile synthetic approach towards the synthesis of 2-substituted carbamoy
l (or thiocarbamoyl)-3-ary1-3,3a,4,5-tetrahydro-2 H-benz[g]indazoles 3a-r a
nd their 2-acylating derivatives 4-6 was reported via the reaction of 2-uns
ubstituted-2H-benz[g]indazoles 2 with isocyanates or their thio analogues,
acid anhydrides and aliphatic or aromatic carboxylic acids. The molluscicid
al activity of the products was screened.