Epimeric Face-Selective Oxidations and Diastereodivergent Transannular Oxonium Ion Formation Fragmentations: Computational Modeling and Total Syntheses of 12-Epoxyobtusallene IV, 12-Epoxyobtusallene II, Obtusallene X, Marilzabicycloallene C, and Marilzabicycloallene D.
Clarke, James; Bonney, Karl J.; Yaqoob, Muhammad; Solanki, Savade; Rzepa, Henry S.; White, Andrew J. P.; Millan, David S.; Braddock, D. Christopher; The Journal of organic chemistry 81 (2016) 9539–9552; doi:10.1021/acs.joc.6b02008

data_4037331
_publ_section_title
;
 Epimeric Face-Selective Oxidations and Diastereodivergent Transannular
 Oxonium Ion Formation Fragmentations: Computational Modeling and Total
 Syntheses of 12-Epoxyobtusallene IV, 12-Epoxyobtusallene II, Obtusallene
 X, Marilzabicycloallene C, and Marilzabicycloallene D.
;
_journal_issue                   20
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              9539
_journal_page_last               9552
_journal_paper_doi               10.1021/acs.joc.6b02008
_journal_volume                  81
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C13 H17 Br Cl N O2'
_chemical_formula_sum            'C13 H17 Br Cl N O2'
_chemical_formula_weight         334.64
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_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                   9.90540(9)
_cell_length_b                   16.30560(13)
_cell_length_c                   17.66934(16)
_cell_measurement_reflns_used    13357
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      72.2095
_cell_measurement_theta_min      2.4986
_cell_volume                     2853.84(4)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.2556
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'OD Xcalibur PX Ultra'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0374
_diffrn_reflns_av_sigmaI/netI    0.0297
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            23427
_diffrn_reflns_theta_full        72.36
_diffrn_reflns_theta_max         72.36
_diffrn_reflns_theta_min         3.69
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.607
_exptl_absorpt_correction_T_max  0.626
_exptl_absorpt_correction_T_min  0.345
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
; 
CrysAlisPro, Oxford Diffraction Ltd., 
Version 1.171.34.44 (release 25-10-2010 CrysAlis171 .NET) 
(compiled Oct 25 2010,18:11:34) 
Analytical numeric absorption correction using a multifaceted crystal 
model based on expressions derived by R.C. Clark & J.S. Reid. 
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897) 
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.558
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       tablets
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.503
_refine_diff_density_min         -0.497
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details
'Flack H D (1983), Acta Cryst. A39, 876-881, 2425 Friedel pairs'
_refine_ls_abs_structure_Flack   -0.038(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         5605
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0363
_refine_ls_R_factor_gt           0.0310
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0309P)^2^+1.3409P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0713
_refine_ls_wR_factor_ref         0.0746
_reflns_number_gt                5086
_reflns_number_total             5605
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo6b02008_si_002.cif
_cod_data_source_block           10
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4037331