caa a22 4500 463185196 CHVBK 20180406164850.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s10870-007-9241-6 doi (NATIONALLICENCE)springer-10.1007/s10870-007-9241-6 Synthesis, Characterization and Structural Conformation Studies of 2-Amino-3-ethoxycarbonyl-4-(4′-methoxy Phenyl)-4H-pyrano-[3,2-c]-chromene-6-methyl-5-one [Elektronische Daten] [S. Naveen, S. Lakshmi, Dinesh Manvar, Alpesh Parecha, Anamik Shah, M. Sridhar, J. Shashidhara Prasad] 2-amino-3-ethoxycarbonyl-4-(4′-methoxy Phenyl)-4H-pyrano-[3,2-c]-chromene-6-methyl-5-one was synthesized by the two-component reaction of 6-methyl-4-hydroxy coumarin with 4′-methoxy-2-cyano cinnamate, which was synthesized by Knoevenagel reaction with 88% yield. The compound obtained was characterized by spectroscopic techniques and confirmed by X-ray crystallographic studies. The crystallographic data analysis reveals that the title compound crystallizes in the triclinic space group $$P\overline{1}$$ with cell parameters a=7.7750(8)Å, b=9.0310(6)Å, c= 15.6120(17)Å, α=77.249(7)°, β= 115.860(3)°, γ=70.139(7)°, V=1,003.0(16)Å3 for Z=4. The structure has been solved by direct methods and refined to R1=0.0552 for 3,164 observed reflections with I>2 σ(I). The pyran ring is in a flattened boat conformation. The carbonyl group is oriented in a -synperiplanar(cis) conformation. Springer Science+Business Media, LLC, 2007 Knoevenagel reaction nationallicence Crystal structure nationallicence Flattened boat nationallicence Hydrogen bonds nationallicence Naveen S. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut Lakshmi S. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut Manvar Dinesh Department of Chemistry, Saurashtra University, 360 005, Rajkot, India aut Parecha Alpesh Department of Chemistry, Saurashtra University, 360 005, Rajkot, India aut Shah Anamik Department of Chemistry, Saurashtra University, 360 005, Rajkot, India aut Sridhar M. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut Shashidhara Prasad J. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut Journal of Chemical Crystallography Springer US; http://www.springer-ny.com 37/11(2007-11-01), 733-738 1074-1542 37:11<733 2007 37 10870 https://doi.org/10.1007/s10870-007-9241-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10870-007-9241-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Naveen S. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut NATIONALLICENCE 700 1- Lakshmi S. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut NATIONALLICENCE 700 1- Manvar Dinesh Department of Chemistry, Saurashtra University, 360 005, Rajkot, India aut NATIONALLICENCE 700 1- Parecha Alpesh Department of Chemistry, Saurashtra University, 360 005, Rajkot, India aut NATIONALLICENCE 700 1- Shah Anamik Department of Chemistry, Saurashtra University, 360 005, Rajkot, India aut NATIONALLICENCE 700 1- Sridhar M. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut NATIONALLICENCE 700 1- Shashidhara Prasad J. Department of Studies in Physics, University of Mysore, 570 006, Mysore, India aut NATIONALLICENCE 773 0- Journal of Chemical Crystallography Springer US; http://www.springer-ny.com 37/11(2007-11-01), 733-738 1074-1542 37:11<733 2007 37 10870 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer