Chiral Cyclopropenyl Ketones: Reactive and Selective Diels-Alder Dienophiles
Laural A. Fisher; Natalee J. Smith; Joseph M. Fox; Journal of Organic Chemistry 78 (2013) 3342–3348; doi:10.1021/jo302683t

data_4028072
_publ_section_title
;
 Chiral Cyclopropenyl Ketones: Reactive and Selective Diels-Alder
 Dienophiles
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3342
_journal_page_last               3348
_journal_paper_doi               10.1021/jo302683t
_journal_volume                  78
_journal_year                    2013
_chemical_formula_sum            'C21 H22 N2 O8'
_chemical_formula_weight         430.41
_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                109.980(2)
_cell_angle_beta                 103.478(2)
_cell_angle_gamma                97.274(2)
_cell_formula_units_Z            2
_cell_length_a                   8.1567(10)
_cell_length_b                   10.7545(13)
_cell_length_c                   12.9755(16)
_cell_measurement_reflns_used    903
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      2.70
_cell_volume                     1013.4(2)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2001)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 836.6
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker AXS APEX diffractometer'
_diffrn_measurement_method       \w
_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  0.0127
_diffrn_reflns_av_sigmaI/netI    0.0130
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            9597
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  0.9619
_exptl_absorpt_correction_T_min  0.9454
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2003)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.410
_exptl_crystal_description       block
_exptl_crystal_F_000             452
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.43
_exptl_crystal_size_min          0.36
_refine_diff_density_max         0.354
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     283
_refine_ls_number_reflns         3550
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0412
_refine_ls_R_factor_gt           0.0385
_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^)+(0.1300P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1403
_refine_ls_wR_factor_ref         0.1483
_reflns_number_gt                3247
_reflns_number_total             3550
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo302683t_si_002.cif
_cod_data_source_block           joef066
_cod_database_code               4028072