Polysubstituted oxygen heterocycles by a Reformatsky-type reaction/reductive cyclization approach from enantiopure beta-ketosulfoxides.
Colobert, Françoise; Choppin, Sabine; Ferreiro-Mederos, Leticia; Obringer, Michel; Arratta, Sandra Luengo; Urbano, Antonio; Carreño, M Carmen; Organic letters 9 (2007) 4451–4454; doi:10.1021/ol701670g

data_1505533
_publ_section_title
;
 Polysubstituted oxygen heterocycles by a Reformatsky-type
 reaction/reductive cyclization approach from enantiopure
 beta-ketosulfoxides.
;
_journal_issue                   22
_journal_name_full               'Organic letters'
_journal_page_first              4451
_journal_page_last               4454
_journal_paper_doi               10.1021/ol701670g
_journal_volume                  9
_journal_year                    2007
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C16 H32 O5 S'
_chemical_formula_sum            'C16 H32 O5 S'
_chemical_formula_weight         336.48
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.82600(10)
_cell_length_b                   10.9460(3)
_cell_length_c                   28.9790(7)
_cell_measurement_reflns_used    2331
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      29.131
_cell_measurement_theta_min      0.998
_cell_volume                     1848.03(7)
_computing_cell_refinement       'Denzo (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo (Nonius B.V., 1998)'
_computing_molecular_graphics    'PLATON 98 (Spek, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       '\p scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0575
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            4654
_diffrn_reflns_theta_full        29.13
_diffrn_reflns_theta_max         29.13
_diffrn_reflns_theta_min         1.41
_exptl_absorpt_coefficient_mu    0.194
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.209
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.256
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     201
_refine_ls_number_reflns         4654
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0508
_refine_ls_R_factor_gt           0.0399
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0057P)^2^+0.3896P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0767
_refine_ls_wR_factor_ref         0.0808
_reflns_number_gt                4040
_reflns_number_total             4654
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol701670g-file001.cif
_cod_data_source_block           shelxl
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1505533