1-(3,5-Bis(trifluoromethyl)phenyl)-3-((1S,2S)-2-((11bS)-3,5-dihydro-4H-dinaphtho[2,1-c:1',2'-e]azepin-4-yl)-1,2-diphenylethyl)thiourea is a chiral thiourea catalyst that has emerged as an efficient class of organocatalysts due to their unique dual hydrogen-bonding capacity.