mCPBA-Mediated Intramolecular Oxidative Annulation of ortho-Crotyl or Cinnamyl Arylaldehydes: Synthesis of Benzofused Five-, Six-, and Seven-Membered Oxacycles.
Chang, Meng-Yang; Hsiao, Yu-Ting; Lai, Kai-Hsiang; The Journal of organic chemistry 83 (2018) 14110–14119; doi:10.1021/acs.joc.8b02146

data_4034890
_publ_section_title
;
 mCPBA-Mediated Intramolecular Oxidative Annulation of ortho-Crotyl or
 Cinnamyl Arylaldehydes: Synthesis of Benzofused Five-, Six-, and
 Seven-Membered Oxacycles.
;
_journal_issue                   22
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              14110
_journal_page_last               14119
_journal_paper_doi               10.1021/acs.joc.8b02146
_journal_volume                  83
_journal_year                    2018
_chemical_formula_sum            'C21 H26 O4'
_chemical_formula_weight         342.42
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                90
_cell_angle_beta                 111.667(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.0101(14)
_cell_length_b                   10.6094(13)
_cell_length_c                   15.9081(19)
_cell_measurement_reflns_used    6692
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.3438
_cell_measurement_theta_min      2.3628
_cell_volume                     1883.8(4)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0344
_diffrn_reflns_av_unetI/netI     0.0228
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            26303
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.438
_diffrn_reflns_theta_min         2.363
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.9485
_exptl_absorpt_correction_T_min  0.8852
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/4 (Bruker AXS Inc.)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.207
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lump
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.320
_refine_diff_density_min         -0.242
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         3848
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0542
_refine_ls_R_factor_gt           0.0388
_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^)+(0.0481P)^2^+0.9799P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0968
_refine_ls_wR_factor_ref         0.1079
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3036
_reflns_number_total             3848
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b02146_si_002.cif
_cod_data_source_block           mo_180421lt_0m_a_sq
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4034890
_shelxl_version_number           2014/6
_shelx_res_checksum              18028
_shelx_hkl_checksum              87943
_shelx_fab_checksum              935