[(R)-5-(4-methoxy-benzyl)-6-oxo-6,7-dihydro-5H-dibenzo[b,d]azepin-7-yl]-carbamic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester

N-[(7R)-6,7-Dihydro-5-[(4-methoxyphenyl)methyl]-6-oxo-5H-dibenz[b,d]azepin-7-yl]-carbamic Acid (1R,2S,5R)-5-Methyl-2-(1-methylethyl)cyclohexyl ester is an impurity in the synthesis of (S)-7-Amino-5H,7H-dibenzo[b,d]azepin-6-one, a building block for γ-secretase inhibitors for treatment of Alzheimer''s disease. Several γ-secretase inhibitors have been described that contain this compound.