N-Phenoxyamides as Multitasking Reagents: Base-Controlled Selective Construction of Benzofurans or Dihydrobenzofuro[2,3- d]oxazoles.
Li, Ming; Wang, Jia-Hui; Li, Wei; Lin, Cheng-Dong; Zhang, Lin-Bao; Wen, Li-Rong; The Journal of organic chemistry 84 (2019) 8523–8530; doi:10.1021/acs.joc.9b00858

data_4034106
_publ_section_title
;
 N-Phenoxyamides as Multitasking Reagents: Base-Controlled Selective
 Construction of Benzofurans or Dihydrobenzofuro[2,3- d]oxazoles.
;
_journal_issue                   13
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              8523
_journal_page_last               8530
_journal_paper_doi               10.1021/acs.joc.9b00858
_journal_volume                  84
_journal_year                    2019
_chemical_formula_moiety         'C15 H11 N O2'
_chemical_formula_sum            'C15 H11 N O2'
_chemical_formula_weight         237.25
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-08-31
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
????
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   11.188(3)
_cell_length_b                   7.6803(19)
_cell_length_c                   26.991(7)
_cell_measurement_reflns_used    7044
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4848
_cell_measurement_theta_min      0.7544
_cell_volume                     2319.3(10)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'CIFTAB (Sheldrick, 2014)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      173.15
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'MM007-HF CCD(Saturn 724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0469
_diffrn_reflns_av_unetI/netI     0.0283
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            14706
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.489
_diffrn_reflns_theta_min         3.019
_diffrn_source                   'Rotating Anode'
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.80999
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.359
_exptl_crystal_description       block
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.624
_exptl_crystal_size_mid          0.571
_exptl_crystal_size_min          0.212
_refine_diff_density_max         0.265
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.236
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         2647
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.236
_refine_ls_R_factor_all          0.0524
_refine_ls_R_factor_gt           0.0511
_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^)+(0.0267P)^2^+1.1360P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1059
_refine_ls_wR_factor_ref         0.1065
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2597
_reflns_number_total             2647
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo9b00858_si_002.cif
_cod_data_source_block           a
_cod_original_cell_volume        2319.2(10)
_cod_database_code               4034106
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.981
_shelx_estimated_absorpt_t_min   0.945
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7), C8(H8)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C11(H11), C12(H12), C13(H13), C14(H14),
 C15(H15)
;
_shelx_res_checksum              3912
_shelx_hkl_checksum              15727
_olex2_submission_special_instructions 'No special instructions were received'