Asymmetric synthesis of functionalized pyrrolizidines by an organocatalytic and pot-economy strategy
Lin, Chia-Hsin; Hong, Bor-Cherng; Lee, Gene-Hsiang; RSC Adv. 6 (2016) 8243–; doi:10.1039/C5RA25103F

data_7223946
_publ_section_title
;
 Asymmetric synthesis of functionalized pyrrolizidines by an
 organocatalytic and pot-economy strategy
;
_journal_issue                   10
_journal_name_full               'RSC Adv.'
_journal_page_first              8243
_journal_paper_doi               10.1039/C5RA25103F
_journal_volume                  6
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_sum            'C12 H14 Br N O5'
_chemical_formula_weight         332.15
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2015-08-25 deposited with the CCDC.
2016-01-11 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.8370(4)
_cell_length_b                   9.2077(6)
_cell_length_c                   25.6068(16)
_cell_measurement_reflns_used    3523
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      21.90
_cell_measurement_theta_min      2.35
_cell_volume                     1376.25(16)
_computing_cell_refinement       'Bruker SAINT'
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'BRUKER SMART APEXCCD area detector'
_diffrn_measurement_method       '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  0.0417
_diffrn_reflns_av_sigmaI/netI    0.0340
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            12428
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    3.002
_exptl_absorpt_correction_T_max  0.8174
_exptl_absorpt_correction_T_min  0.3152
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (BRUKER, 2001)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.603
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             672
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.446
_refine_diff_density_min         -0.424
_refine_diff_density_rms         0.161
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.015(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.117
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         3154
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.117
_refine_ls_R_factor_all          0.0428
_refine_ls_R_factor_gt           0.0342
_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^)+(0.0535P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0814
_refine_ls_wR_factor_ref         0.0961
_reflns_number_gt                2789
_reflns_number_total             3154
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ra25103f2.cif
_cod_data_source_block           ic17175
_cod_depositor_comments
;
The following automatic conversions were performed:

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

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7223946