Crystal structure of ethyl (4R)-2-amino-7-hy-droxy-4-phenyl-4H-chromene-3-carboxyl-ate.
In the title compound, C18H17NO4, the dihedral angle between the phenyl ring and the fused six-membered ring is 77.65 (4)°. The conformation of the mol-ecule is determined in part by an intra-molecular N-H⋯O hydrogen bond between the amino H atom and the carbonyl O atom, forming an S(6) motif. In the crystal, mol-ecules are linked into N-H⋯O hydrogen-bonded inversion dimers which are then connected into chains along [001], forming a two-dimensional network parallel to (100) via O-H⋯O hydrogen bonds. C-H⋯O interactions further contribute to the crystal stability. The ethyl group is disordered over two sets of sites in a 0.801 (5):0.199 (5) ratio.
Department of Chemistry, Tulane University, New Orleans, LA 70118, USA.
Joel T
JT
Mague
Faculty of Science & Engineering, School of Healthcare Science, Manchester Metropolitan University, Manchester M1 5GD, England ; Chemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt.
Shaaban K
SK
Mohamed
Department of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey.
Mehmet
M
Akkurt
Chemistry Department, Faculty of Science, Sohag University, 82524 Sohag, Egypt.
Sabry H H
SH
Younes
Kirkuk University, College of Education, Department of Chemistry, Kirkuk, Iraq.
Mustafa R
MR
Albayati
4H-chromene; amino chromenes; crystal structure; hydrogen bonding