A review on synthesis methods of tricyclic 1,2,3,4-tetrahydrocarbazoles

In this review article, we discussed old to new synthetic methods used for the preparation of 1,2,3,4-Tetrahydrocarbazole (THCz) based on reported literature. Around the worldwide, various researchers energetically reported new synthetic methods for tetrahydrocarbazoles preparation using conventional method or microwave method or use of catalyst. This review will be helpful to synthetic and medicinal chemist to find selective method for the preparation of 1,2,3,4-Tetrahydrocarbazoles with good percentage yield and less time. This review will also useful to medicinal chemist to design new biologically active tetrahydrocarbazoles based on reported synthetic methods.