Regioselective single and double conjugate additions to substituted cyclohexa-2,5-dienone monoacetals.
Grecian, Scott; Wrobleski, Aaron D.; Aubé, Jeffrey; Organic letters 7 (2005) 3167–3170; doi:10.1021/ol050715c

data_1506582
_publ_section_title
;
 Regioselective single and double conjugate additions to substituted
 cyclohexa-2,5-dienone monoacetals.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3167
_journal_page_last               3170
_journal_paper_doi               10.1021/ol050715c
_journal_volume                  7
_journal_year                    2005
_chemical_formula_moiety         'C20 H23 N O8'
_chemical_formula_sum            'C20 H23 N O8'
_chemical_formula_weight         405.39
_chemical_name_systematic
; 
 Ethyl 9,9-dimethoxy-6-(2-nitrophenyl)-3,7-
 dioxobicyclo[3.3.1]nonane-2-carboxylate 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                74.294(3)
_cell_angle_beta                 89.534(4)
_cell_angle_gamma                89.004(4)
_cell_formula_units_Z            4
_cell_length_a                   8.4839(12)
_cell_length_b                   11.9599(18)
_cell_length_c                   19.058(3)
_cell_measurement_reflns_used    7443
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.00
_cell_measurement_theta_min      2.22
_cell_volume                     1861.3(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2000)'
_computing_publication_material  'SHELXTL (Sheldrick, 2000)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2000)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2000)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.942
_diffrn_measured_fraction_theta_max 0.942
_diffrn_measurement_device_type  'Bruker APEX'
_diffrn_measurement_method       '\w 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  0.0161
_diffrn_reflns_av_sigmaI/netI    0.0282
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11787
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.82
_diffrn_standards_decay_%        -0.34
_diffrn_standards_number         229
_exptl_absorpt_coefficient_mu    0.113
_exptl_absorpt_correction_T_max  0.988
_exptl_absorpt_correction_T_min  0.964
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2002)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.447
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.347
_refine_diff_density_min         -0.242
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     523
_refine_ls_number_reflns         6904
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0443
_refine_ls_R_factor_gt           0.0400
_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^)+(0.0600P)^2^+1.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1086
_refine_ls_wR_factor_ref         0.1119
_reflns_number_gt                6182
_reflns_number_total             6904
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ol050715csi20050404_121828.cif
_cod_data_source_block           compound_15_
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_database_code               1506582