Ethyl 6-methyl-3-(2-methyl-prop-1-en-yl)-2-oxo-4-phenyl-1,2,3,4-tetra-hydro-pyrimidine-5-carboxyl-ate.
In the mol-ecule of the title compound, C(18)H(22)N(2)O(3), the dihydro-pyrimidinone ring adopts an envelope conformation. The dihedral angle between the phenyl ring and the mean plane through the enamine fragment is 86.04 (7)°. The mol-ecular conformation is stabilized by an intra-molecular C-H⋯O hydrogen bond. In the crystal, inter-molecular N-H⋯O hydrogen bonds link pairs of mol-ecules into centrosymmetric dimers.
Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070,  People's Republic of China.
Xi-Cun
XC
Wang
Xue-Hong
XH
Tang
Yu-Xia
YX
Da
Zhang
Z
Zhang
Zheng-Jun
ZJ
Quan