Double-Diels-Alder Approach to Maoecrystal V. Unexpected C-C Bond-Forming Fragmentations of the [2.2.2]-Bicyclic Core.
Smith, Brandon R.; Njardarson, Jon T.; Organic letters 19 (2017) 5316–5319; doi:10.1021/acs.orglett.7b02606

data_1547195
_publ_section_title
;
 Double-Diels-Alder Approach to Maoecrystal V. Unexpected C-C Bond-Forming
 Fragmentations of the [2.2.2]-Bicyclic Core.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5316
_journal_page_last               5319
_journal_paper_doi               10.1021/acs.orglett.7b02606
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C14 H16 O4'
_chemical_formula_sum            'C14 H16 O4'
_chemical_formula_weight         248.27
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_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     dual
_audit_creation_date             2017-05-24
_audit_creation_method
;
Olex2 1.2
(compiled 2015.09.30 svn.r3233 for OlexSys, GUI svn.r5103)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   11.3435(13)
_cell_length_b                   12.4428(13)
_cell_length_c                   18.028(2)
_cell_measurement_reflns_used    2946
_cell_measurement_temperature    100
_cell_measurement_theta_max      22.81
_cell_measurement_theta_min      2.68
_cell_volume                     2544.6(5)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'XT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'Bruker SMART CCD 1K area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker SMART CCD 1K area detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0680
_diffrn_reflns_av_unetI/netI     0.0466
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            22770
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         27.533
_diffrn_reflns_theta_min         2.259
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_target            Mo
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5439
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014/5) was used for absorption correction.
wR2(int) was 0.1023 before and 0.0656 after correction.
The Ratio of minimum to maximum transmission is 0.7295.
The \l/2 correction factor is 0.00150.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.296
_exptl_crystal_description       plate
_exptl_crystal_F_000             1056
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     166
_refine_ls_number_reflns         2917
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0752
_refine_ls_R_factor_gt           0.0522
_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^)+(0.0646P)^2^+0.5296P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1295
_refine_ls_wR_factor_ref         0.1429
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2061
_reflns_number_total             2917
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol7b02606_si_002.cif
_cod_data_source_block           mo_bsiv165i_0m
_cod_depositor_comments
'Adding full bibliography for 1547195--1547196.cif.'
_cod_database_code               1547195
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C007(H007), C00E(H00E)
2.b Secondary CH2 refined with riding coordinates:
 C00F(H00A,H00B)
2.c Aromatic/amide H refined with riding coordinates:
 C008(H008), C00C(H00C), C00D(H00D)
2.d Idealised Me refined as rotating group:
 C00G(H00F,H00G,H00H), C00H(H00I,H00J,H00K), C00I(H00L,H00M,H00N)
;
_shelx_res_checksum              65727
_shelx_hkl_checksum              69593
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'