Synthesis and Conformational Study of Chiral Oxepines: The Baylis-Hillman Reaction and RCM Approach with Sugar Aldehyde
Vrushali H. Jadhav; Omprakash P. Bande; Rahul V. Pinjari; Shridhar P. Gejji; Vedavati G. Puranik; Dilip D. Dhavale; Journal of Organic Chemistry 74 (2009) 6486–6494; doi:10.1021/jo900660q

data_4024795
_publ_section_title
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Synthesis and Conformational Study of Chiral Oxepines: The Baylis-Hillman
Reaction and RCM Approach with Sugar Aldehyde
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6486
_journal_page_last               6494
_journal_paper_doi               10.1021/jo900660q
_journal_volume                  74
_journal_year                    2009
_chemical_formula_moiety         'C12 H18 O6'
_chemical_formula_sum            'C12 H18 O6'
_chemical_formula_weight         258.26
_chemical_melting_point          419.1(10)
_chemical_name_common            Oxepines
_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                   8.8165(5)
_cell_length_b                   11.1574(6)
_cell_length_c                   12.4237(7)
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      28.173
_cell_measurement_theta_min      2.454
_cell_volume                     1222.11(12)
_computing_cell_refinement       'BRUKER SAINT'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       'Bruker Smart APEX'
_diffrn_measurement_device_type  'CCD Area Detector'
_diffrn_measurement_method       'Omega 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  0.0204
_diffrn_reflns_av_sigmaI/netI    0.0197
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            6151
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_T_max  0.9717
_exptl_absorpt_correction_T_min  0.9510
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.404
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rectangular
_exptl_crystal_F_000             552
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.371
_refine_diff_density_min         -0.649
_refine_diff_density_rms         0.171
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.3(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.169
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     167
_refine_ls_number_reflns         2132
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.169
_refine_ls_R_factor_all          0.0432
_refine_ls_R_factor_gt           0.0426
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0718P)^2^+0.0902P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1031
_refine_ls_wR_factor_ref         0.1038
_reflns_number_gt                2085
_reflns_number_total             2132
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo900660q_si_001.cif
_cod_data_source_block           C12H18O6compound6a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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:

'_chemical_melting_point' value '145-147 degree centigrade' was
changed to '419.1(10)' - it was converted from degrees Celsius(C) to
Kelvins(K), the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               4024795