rac-Dimethyl 5-oxo-2-[(2,4,4-trimethyl-pentan-2-yl)amino]-4,5-dihydro-pyrano[3,2-c]chromene-3,4-dicarboxyl-ate.
The title compound, C(24)H(29)NO(7), is asymmetric with a chiral centre located in the pyran ring and crystallizes as a racemate. The coumarin ring system and the fused pyran ring make a dihedral angle of 10.46 (8)°. A short intra-molecular N-H⋯O hydrogen bond between the amino group and the vicinal carbonyl group generates an S(6) ring. Inter-molecular C-H⋯O inter-actions contribute to the stability of the crystal structure.
S Antony
SA
Inglebert
Yuvaraj
Y
Arun
K
K
Sethusankar
Paramasivam T
PT
Perumal