The base-catalysed Tamura cycloaddition reaction: calculation, mechanism, isolation of intermediates and asymmetric catalysis
Lockett-Walters, Bruce; Trujillo, Cristina; Twamley, Brendan; Connon, Stephen; Chemical Communications  (2019) –; doi:10.1039/C9CC05064G

data_7124110
_publ_section_title
;
 The base-catalysed Tamura cycloaddition reaction: calculation, mechanism,
 isolation of intermediates and asymmetric catalysis
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC05064G
_journal_year                    2019
_chemical_formula_moiety         'C25 H23 N O7'
_chemical_formula_sum            'C25 H23 N O7'
_chemical_formula_weight         449.44
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-02-23
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-09-03 deposited with the CCDC.    2019-09-02 downloaded from the CCDC.
;
_cell_angle_alpha                77.6681(13)
_cell_angle_beta                 78.7428(13)
_cell_angle_gamma                76.0758(13)
_cell_formula_units_Z            2
_cell_length_a                   7.8998(2)
_cell_length_b                   11.8254(4)
_cell_length_c                   12.5588(4)
_cell_measurement_reflns_used    9088
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.97
_cell_measurement_theta_min      2.67
_cell_volume                     1099.60(6)
_computing_cell_refinement       'SAINT v8.38A (Bruker, 2016)'
_computing_data_collection       'APEX 3 (Bruker, 2017) '
_computing_data_reduction        'SAINT v8.38A (Bruker, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'XT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CMOS area detector'
_diffrn_detector_area_resol_mean 5.12
_diffrn_detector_type            'Bruker PHOTON 50'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker D8 Quest ECO'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_collimation    '0.5 mm double-pinhole'
_diffrn_radiation_detector       'Bruker PHOTON 50'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0398
_diffrn_reflns_av_unetI/netI     0.0351
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            21416
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.035
_diffrn_reflns_theta_min         2.670
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'Siemens, KFF Mo 2K -90 C'
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.7085
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0564 before and 0.0503 after correction. The Ratio of minimum to maximum transmission is 0.9321. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.357
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.315
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.014
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     302
_refine_ls_number_reflns         5326
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0599
_refine_ls_R_factor_gt           0.0401
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0450P)^2^+0.3946P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0911
_refine_ls_wR_factor_ref         0.1010
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4090
_reflns_number_total             5326
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc05064g2.cif
_cod_data_source_block           tcd1008
_cod_database_code               7124110
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.988
_shelx_estimated_absorpt_t_min   0.971
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C5(H5), C15(H15)
2.b Aromatic/amide H refined with riding coordinates:
 C7(H7), C8(H8), C9(H9), C10(H10), C22(H22), C23(H23), C24(H24), C25(H25),
 C26(H26)
2.c Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C31(H31A,H31B,H31C), C32(H32A,H32B,H32C), C33(H33A,H33B,H33C)
;
_shelx_res_checksum              91760
_olex2_exptl_crystal_mounting_method 'mounted in oil on a MiTeGen microloop'
_olex2_submission_original_sample_id BLWG647
_olex2_submission_special_instructions 'No special instructions were received'