Synthesis of Furo[3,2-b]quinolines and Furo[2,3-b:4,5-b']diquinolines through [4+2] Cycloaddition of Aza-o-Quinone Methides and Furans.
Lei, Lu; Yao, Yi-Yun; Jiang, Li-Juan; Lu, Xiuqiang; Liang, Cui; Mo, Dong-Liang; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.9b02953

data_4037879
_publ_section_title
;
 Synthesis of Furo[3,2-b]quinolines and Furo[2,3-b:4,5-b']diquinolines
 through [4+2] Cycloaddition of Aza-o-Quinone Methides and Furans.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.9b02953
_journal_year                    2020
_chemical_formula_moiety         'C21 H23 N O3 S'
_chemical_formula_sum            'C21 H23 N O3 S'
_chemical_formula_weight         369.46
_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   geom
_atom_sites_solution_primary     heavy
_audit_creation_date             2019-07-03
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 99.262(6)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.541(5)
_cell_length_b                   9.003(3)
_cell_length_c                   15.044(5)
_cell_measurement_reflns_used    6727
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.01
_cell_measurement_theta_min      2.65
_cell_volume                     1943.8(11)
_computing_cell_refinement       'SAINT v8.27A (Bruker, 2012)'
_computing_data_reduction        'SAINT v8.27A (Bruker, 2012)'
_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    'XS (Sheldrick, 2008)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0334
_diffrn_reflns_av_unetI/netI     0.0230
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            22989
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.469
_diffrn_reflns_theta_min         1.808
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.186
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.263
_exptl_crystal_description       block
_exptl_crystal_F_000             784
_refine_diff_density_max         0.310
_refine_diff_density_min         -0.302
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3995
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0598
_refine_ls_R_factor_gt           0.0460
_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^)+(0.0660P)^2^+0.6254P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1255
_refine_ls_wR_factor_ref         0.1356
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3140
_reflns_number_total             3995
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo9b02953_si_004.cif
_cod_data_source_block           3ol
_cod_original_cell_volume        1943.7(12)
_cod_database_code               4037879
_shelx_shelxl_version_number     2014/7
_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:
 C3(H3), C6(H6)
2.b Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C8(H8), C10(H10), C12(H12), C14(H14), C15(H15), C18(H18),
 C1B(H1B)
2.c Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C17(H17A,H17B,H17C), C1A(H1AA,H1AB,H1AC), C1C(H1CA,H1CB,H1CC)
;
_shelx_res_checksum              81983
_shelx_hkl_checksum              90472
_olex2_submission_special_instructions 'No special instructions were received'