A Novel Synthesis of 5,6-Dihydroindazolo[3,2-a]isoquinolines and Their Relative Compounds via Tin(II) Chloride Dihydrate as Reducing Agent

摘要

A series of 1-(2-nitrophenyl)-3,4-dihydroisoquinolines were reduced under very mild reaction conditions in the presence of Tin(II) chloride dihydrate (SnCl_2 centre dot 2H_2O) to give 5,6-dihydroindazolo[3,2-a]isoquinolines 4a-h.A mechanism for this reaction is proposed.