Group-assisted purification (GAP) chemistry for dihydrofurans: water as a medium for catalyst free synthesis in a one pot four component reaction
Chennapuram, Madhu; Emmadi, Narender Reddy; Bingi, Chiranjeevi; Nanubolu, Jagadeesh Babu; Atmakur, Krishnaiah; Green Chemistry 16 (2014) 3237–; doi:10.1039/c4gc00388h

data_7216460
_publ_section_title
;
 Group-assisted purification (GAP) chemistry for dihydrofurans: water as a
 medium for catalyst free synthesis in a one pot four component reaction
;
_journal_issue                   6
_journal_name_full               'Green Chemistry'
_journal_page_first              3237
_journal_paper_doi               10.1039/c4gc00388h
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C20 H20 Br N O4'
_chemical_formula_sum            'C20 H20 Br N O4'
_chemical_formula_weight         418.28
_chemical_name_systematic
; 
 ethyl3-(4-bromophenyl)-2-cyano-6,6-dimethyl-4-oxo-
2,3,4,5,6,7-hexahydrobenzofuran-2-carboxylate 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 103.6200(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.7001(8)
_cell_length_b                   11.3758(8)
_cell_length_c                   17.0795(12)
_cell_measurement_reflns_used    6685
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.56
_cell_measurement_theta_min      2.17
_cell_volume                     2020.5(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0338
_diffrn_reflns_av_sigmaI/netI    0.0240
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            18883
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    2.057
_exptl_absorpt_correction_T_max  0.8207
_exptl_absorpt_correction_T_min  0.5773
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker AXS SADABS program'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.375
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.656
_refine_diff_density_min         -0.665
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     248
_refine_ls_number_reflns         3571
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0568
_refine_ls_R_factor_gt           0.0430
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0543P)^2^+1.4141P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1097
_refine_ls_wR_factor_ref         0.1207
_reflns_number_gt                2759
_reflns_number_total             3571
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4gc00388h1.cif
_cod_data_source_block           au62m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/current/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7216460