Asymmetric intramolecular cyclobutane formation via photochemical reaction of N,N-diallyl-2-quinolone-3-carboxamide using a chiral crystalline environment.
Yagishita, Fumitoshi; Sakamoto, Masami; Mino, Takashi; Fujita, Tsutomu; Organic letters 13 (2011) 6168–6171; doi:10.1021/ol2028652

data_1502613
_publ_section_title
;
 Asymmetric intramolecular cyclobutane formation via photochemical
 reaction of N,N-diallyl-2-quinolone-3-carboxamide using a chiral
 crystalline environment.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              6168
_journal_page_last               6171
_journal_paper_doi               10.1021/ol2028652
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C18 H20 N2 O2'
_chemical_formula_weight         296.36
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.8221(5)
_cell_length_b                   14.5983(8)
_cell_length_c                   27.4837(16)
_cell_measurement_reflns_used    2366
_cell_measurement_temperature    173
_cell_measurement_theta_max      23.57
_cell_measurement_theta_min      2.79
_cell_volume                     3138.3(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0361
_diffrn_reflns_av_sigmaI/netI    0.0260
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            13887
_diffrn_reflns_theta_full        25.08
_diffrn_reflns_theta_max         25.08
_diffrn_reflns_theta_min         1.48
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.9918
_exptl_absorpt_correction_T_min  0.9677
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS Sheldrick 1997'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.254
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1264
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.173
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.042
_refine_ls_extinction_coef       0.0049(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         2790
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.0570
_refine_ls_R_factor_gt           0.0372
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0540P)^2^+0.4163P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0912
_refine_ls_wR_factor_ref         0.1007
_reflns_number_gt                2034
_reflns_number_total             2790
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol2028652_si_002.cif
_cod_data_source_block           saka191_pbca_re
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               1502613