Enantio- and diastereoselective synthesis of tetrahydrofuro[2,3-b]furan-2(3H)-one derivatives and related oxygen heterocycles via an asymmetric organocatalytic cascade process
Zhao, Wei-Wei; Liu, Yan-Kai; Organic Chemistry Frontiers 4 (2017) 2358–; doi:10.1039/C7QO00621G

data_1553850
_publ_section_title
;
 Enantio- and diastereoselective synthesis of
 tetrahydrofuro[2,3-b]furan-2(3H)-one derivatives and related oxygen
 heterocycles via an asymmetric organocatalytic cascade process
;
_journal_issue                   12
_journal_name_full               'Organic Chemistry Frontiers'
_journal_page_first              2358
_journal_paper_doi               10.1039/C7QO00621G
_journal_volume                  4
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C18 H16 O4 S'
_chemical_formula_sum            'C18 H16 O4 S'
_chemical_formula_weight         328.37
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2017-03-07
_audit_creation_method
;
Olex2 1.2-beta
(compiled 2016.09.09 svn.r3337 for OlexSys, GUI svn.r5227)
;
_audit_update_record
;
2017-03-07 deposited with the CCDC.
2017-08-28 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.7797(10)
_cell_length_b                   10.9021(11)
_cell_length_c                   14.8619(15)
_cell_measurement_reflns_used    6962
_cell_measurement_temperature    296.15
_cell_measurement_theta_max      27.189
_cell_measurement_theta_min      2.317
_cell_volume                     1584.6(3)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0209
_diffrn_reflns_av_unetI/netI     0.0183
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            12594
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.405
_diffrn_reflns_theta_min         2.317
_exptl_absorpt_coefficient_mu    0.222
_exptl_absorpt_correction_T_max  0.7453
_exptl_absorpt_correction_T_min  0.6214
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.0704 before and 0.0409 after correction.
The Ratio of minimum to maximum transmission is 0.8338.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.376
_exptl_crystal_description       block
_exptl_crystal_F_000             688
_refine_diff_density_max         0.175
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details
;
 Flack x determined using 1169 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.020(18)
_refine_ls_extinction_coef       0.021(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3497
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0427
_refine_ls_R_factor_gt           0.0340
_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^)+(0.0447P)^2^+0.2861P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0860
_refine_ls_wR_factor_ref         0.0919
_reflns_Friedel_coverage         0.726
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.959
_reflns_number_gt                3036
_reflns_number_total             3497
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7qo00621g2.cif
_cod_data_source_block           zww_0m
_cod_database_code               1553850
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Ternary CH refined with riding coordinates:
 C4(H4), C6(H6), C7(H7), C9(H9)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C8(H8A,H8B)
2.c Aromatic/amide H refined with riding coordinates:
 C11(H11), C12(H12), C13(H13), C14(H14), C15(H15), C16(H16), C17(H17), C18(H18)
;
_shelx_res_checksum              90163
_shelx_hkl_checksum              24642
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'