Stereospecific Synthesis of Tetrahydronaphtho[2,3-b]furans Enabled by a Nickel-Promoted Tandem Reductive Cyclization.
Peng, Yu; Xiao, Jian; Xu, Xiao-Bo; Duan, Shu-Ming; Ren, Li; Shao, Yong-Liang; Wang, Ya-Wen; Organic letters 18 (2016) 5170–5173; doi:10.1021/acs.orglett.6b02665

data_1555846
_publ_section_title
;
 Stereospecific Synthesis of Tetrahydronaphtho[2,3-b]furans Enabled by a
 Nickel-Promoted Tandem Reductive Cyclization.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5170
_journal_page_last               5173
_journal_paper_doi               10.1021/acs.orglett.6b02665
_journal_volume                  18
_journal_year                    2016
_chemical_absolute_configuration none
_chemical_formula_moiety         'C22 H22 O7'
_chemical_formula_sum            'C22 H22 O7'
_chemical_formula_weight         398.39
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2014-03-31
_audit_creation_method
;
Olex2 1.2
(compiled 2014.03.20 svn.r2914 for OlexSys, GUI svn.r4816)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.8269(2)
_cell_length_b                   5.82087(13)
_cell_length_c                   20.8138(4)
_cell_measurement_reflns_used    8242
_cell_measurement_temperature    297.9(5)
_cell_measurement_theta_max      70.4830
_cell_measurement_theta_min      5.0440
_cell_volume                     1917.50(6)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      297.9(5)
_diffrn_detector_area_resol_mean 16.0733
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      0.0802259000
_diffrn_orient_matrix_UB_12      -0.0895750000
_diffrn_orient_matrix_UB_13      0.0336030000
_diffrn_orient_matrix_UB_21      0.0348274000
_diffrn_orient_matrix_UB_22      -0.0819592000
_diffrn_orient_matrix_UB_23      -0.0651924000
_diffrn_orient_matrix_UB_31      0.0427057000
_diffrn_orient_matrix_UB_32      0.2351956000
_diffrn_orient_matrix_UB_33      -0.0099655000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54183
_diffrn_reflns_av_R_equivalents  0.0307
_diffrn_reflns_av_unetI/netI     0.0191
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.989
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            16947
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.984
_diffrn_reflns_theta_full        67.683
_diffrn_reflns_theta_max         70.664
_diffrn_reflns_theta_min         4.248
_diffrn_source                   'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.859
_exptl_absorpt_correction_T_max  0.814
_exptl_absorpt_correction_T_min  0.766
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.380
_exptl_crystal_description       block
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.949
_refine_diff_density_min         -0.165
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details
;
 Flack x determined using 1626 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.16(8)
_refine_ls_extinction_coef       0.0034(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     266
_refine_ls_number_reflns         3611
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0519
_refine_ls_R_factor_gt           0.0503
_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^)+(0.1044P)^2^+0.3231P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1437
_refine_ls_wR_factor_ref         0.1466
_reflns_Friedel_coverage         0.932
_reflns_Friedel_fraction_full    0.996
_reflns_Friedel_fraction_max     0.980
_reflns_number_gt                3476
_reflns_number_total             3611
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol6b02665_si_008.cif
_cod_data_source_block           xiaojian0327
_cod_database_code               1555846
_shelxl_version_number           2013-2
_reflns_odcompleteness_completeness 99.80
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     66.97
_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:
 C1(H1), C10(H10), C11(H11)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C6(H6A,H6B), C13(H13A,H13B)
2.c Aromatic/amide H refined with riding coordinates:
 C4(H4), C8(H8), C15(H15), C19(H19)
2.d Idealised Me refined as rotating group:
 C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C22(H22A,H22B,H22C)
;
_shelx_res_checksum              7753
_shelx_hkl_checksum              28784