Copper(i)-catalyzed intramolecular [2 + 2] cycloaddition of 1,6-enyne-derived ketenimine: an efficient construction of strained and bridged 7-substituted-3-heterobicyclo[3.1.1]heptan-6-one
Li, Bao-Sheng; Yang, Bin-Miao; Wang, Shao-Hua; Zhang, Yong-Qiang; Cao, Xiao-Ping; Tu, Yong-Qiang; Chemical Science 3 (2012) 1975–; doi:10.1039/c2sc20109g

data_1515182
_publ_section_title
;
 Copper(i)-catalyzed intramolecular [2 + 2] cycloaddition of
 1,6-enyne-derived ketenimine: an efficient construction of strained and
 bridged 7-substituted-3-heterobicyclo[3.1.1]heptan-6-one
;
_journal_issue                   6
_journal_name_full               'Chemical Science'
_journal_page_first              1975
_journal_paper_doi               10.1039/c2sc20109g
_journal_volume                  3
_journal_year                    2012
_chemical_formula_sum            'C18 H16 O2'
_chemical_formula_weight         264.31
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 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                   19.372(13)
_cell_length_b                   5.761(4)
_cell_length_c                   24.488(16)
_cell_measurement_reflns_used    1331
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      18.76
_cell_measurement_theta_min      2.26
_cell_volume                     2733(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      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.1089
_diffrn_reflns_av_sigmaI/netI    0.1125
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            17916
_diffrn_reflns_theta_full        25.30
_diffrn_reflns_theta_max         25.30
_diffrn_reflns_theta_min         2.26
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.9845
_exptl_absorpt_correction_T_min  0.9813
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.285
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       stick
_exptl_crystal_F_000             1120
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.517
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.075
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.968
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     361
_refine_ls_number_reflns         4932
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.968
_refine_ls_R_factor_all          0.1562
_refine_ls_R_factor_gt           0.0928
_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^)+(0.1703P)^2^+0.2924P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2324
_refine_ls_wR_factor_ref         0.2847
_reflns_number_gt                2743
_reflns_number_total             4932
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2sc20109g.txt
_cod_data_source_block           pna21
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/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      Pna2(1)
_cod_database_code               1515182