Rapid construction of the aza-propellane core of acutumine via a photochemical [2 + 2] cycloaddition reaction.
Navarro, Raul; Reisman, Sarah E.; Organic letters 14 (2012) 4354–4357; doi:10.1021/ol3017963

data_1508594
_publ_section_title
;
 Rapid construction of the aza-propellane core of acutumine via a
 photochemical [2 + 2] cycloaddition reaction.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              4354
_journal_page_last               4357
_journal_paper_doi               10.1021/ol3017963
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C16 H23 N O4'
_chemical_formula_sum            'C16 H23 N O4'
_chemical_formula_weight         293.35
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   12.1329(5)
_cell_length_b                   14.5974(6)
_cell_length_c                   16.4163(7)
_cell_measurement_reflns_used    9695
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      41.09
_cell_measurement_theta_min      2.51
_cell_volume                     2907.5(2)
_computing_cell_refinement       'Bruker SAINT-Plus v7.68A'
_computing_data_collection       'Bruker APEX2 v2009.7-0'
_computing_data_reduction        'Bruker SAINT-Plus v7.68A'
_computing_molecular_graphics    'Bruker XP v5.1'
_computing_publication_material  'Bruker XCIF 2008'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker KAPPA APEX II'
_diffrn_measurement_method       '\w scans; 10 settings'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
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_diffrn_reflns_av_sigmaI/netI    0.0579
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            125921
_diffrn_reflns_theta_full        43.45
_diffrn_reflns_theta_max         43.45
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.9820
_exptl_absorpt_correction_T_min  0.9700
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.340
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1264
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.496
_refine_diff_density_min         -0.336
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_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.3(3)
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    Riding
_refine_ls_matrix_type           'Full matrix'
_refine_ls_number_parameters     385
_refine_ls_number_reflns         21388
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.728
_refine_ls_R_factor_all          0.0649
_refine_ls_R_factor_gt           0.0420
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details     w=1/s^2^(Fo^2^)
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.0639
_refine_ls_wR_factor_ref         0.0649
_reflns_number_gt                15751
_reflns_number_total             21388
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol3017963_si_004.cif
_cod_data_source_block           run04
_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 2.4.2 from
2011-04-26.

'_refine_ls_weighting_scheme' value 'Sigma' changed to
'sigma' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_atom_sites_solution_primary' value 'Direct methods' was changed to
'direct'.

'_atom_sites_solution_secondary' value 'Difference Fourier map' was
changed to 'difmap'.

'_atom_sites_solution_hydrogens' value 'Geometric positions' was
changed to 'geom'.

Automatic conversion script
Id: cif_fix_values 6452 2018-10-05 10:23:21Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1508594