| abstract |
The invention relates to a phosphodiesterase 4 inhibitor capable of avoiding a vomiting reaction. The phosphodiesterase 4 inhibitor is a compound or a pro-drug or a solvate represented by formula (I), wherein R1 is independent methoxyl, bromine and substituted aryl; X is a randomly substituted six-membered heterocycle; Y is -(CH2)n-, -NH(CH2)n- and -NH(CH2)n-O-, wherein n can be any one of 0, 1, 2 or 3; and Z is a randomly substituted aromatic ring or a randomly substituted heteroaromatic ring. The phosphodiesterase 4 inhibitor capable of avoiding the vomiting reaction is a novel biphenyl PDE4D inhibitor which is applicable to treating depression and Alzheimer's disease and improving cognitive competence, and is capable of avoiding a side effect such as the vomiting. |