Multicomponent reactions involving tricyclooxonium ylide intermediate: diastereoselective synthesis of mono- and bisalkoxyoctahydro-1,4-benzodioxocin-6(5H)-one frameworks.
Muthusamy, Sengodagounder; Krishnamurthi, Janagiraman; Suresh, Eringathodi; Chemical communications (Cambridge, England)  (2007) 861–863; doi:10.1039/b613008a

data_7101721
_publ_section_title
;
 Multicomponent reactions involving tricyclooxonium ylide intermediate:
 diastereoselective synthesis of mono- and
 bisalkoxyoctahydro-1,4-benzodioxocin-6(5H)-one frameworks.
;
_journal_issue                   8
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              861
_journal_page_last               863
_journal_paper_doi               10.1039/b613008a
_journal_year                    2007
_chemical_formula_sum            'C19 H24 O6'
_chemical_formula_weight         348.38
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 101.138(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.6678(14)
_cell_length_b                   11.1324(17)
_cell_length_c                   16.858(3)
_cell_measurement_temperature    293(2)
_cell_volume                     1780.2(5)
_computing_cell_refinement       'BRUKER SMART'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    ORTEP
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.939
_diffrn_measured_fraction_theta_max 0.939
_diffrn_measurement_device_type  'BRUKER SMART APEX CCD DIFFRACTOMETER'
_diffrn_measurement_method       'OMEGA-PHI SCAN'
_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  0.0457
_diffrn_reflns_av_sigmaI/netI    0.0597
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            8627
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.15
_exptl_absorpt_coefficient_mu    0.096
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.300
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Blocks
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.279
_refine_diff_density_min         -0.252
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.126
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         3111
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.126
_refine_ls_R_factor_all          0.1063
_refine_ls_R_factor_gt           0.0649
_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^)+(0.0925P)^2^+0.1070P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1588
_refine_ls_wR_factor_ref         0.1919
_reflns_number_gt                2016
_reflns_number_total             3111
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b613008a.txt
_cod_data_source_block           compound_11d
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0925P)^2^+0.1070P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0925P)^2^+0.1070P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7101721