Asymmetric Synthesis of Tetracyclic Benzo[a]quinolizidine Targets
Steven M. Allin; Sean N. Gaskell; Mark R. J. Elsegood; William P. Martin; Journal of Organic Chemistry 73 (2008) 6448–6451; doi:10.1021/jo801019h

data_4023620
_publ_section_title
;
 Asymmetric Synthesis of Tetracyclic Benzo[a]quinolizidine Targets
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6448
_journal_page_last               6451
_journal_paper_doi               10.1021/jo801019h
_journal_volume                  73
_journal_year                    2008
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C19 H25 N O4, C H2 Cl2'
_chemical_formula_sum            'C20 H27 Cl2 N O4'
_chemical_formula_weight         416.33
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   'all non-H atoms found by direct methods'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.5685(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.5974(6)
_cell_length_b                   8.9918(7)
_cell_length_c                   14.6880(12)
_cell_measurement_reflns_used    6175
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      56.46
_cell_measurement_theta_min      5.32
_cell_volume                     1000.21(14)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.924
_diffrn_measurement_device_type  'Bruker SMART 1K CCD diffractometer'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0147
_diffrn_reflns_av_sigmaI/netI    0.0217
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8843
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.79
_diffrn_reflns_theta_min         2.66
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.350
_exptl_absorpt_correction_T_max  0.963
_exptl_absorpt_correction_T_min  0.620
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v2.10 (Sheldrick, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.382
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Long Block'
_exptl_crystal_F_000             440
_exptl_crystal_size_max          1.51
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.255
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         4570
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0375
_refine_ls_R_factor_gt           0.0347
_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^)+(0.0507P)^2^+0.2973P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0884
_refine_ls_wR_factor_ref         0.0908
_reflns_number_gt                4298
_reflns_number_total             4570
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo801019h-file003.cif
_cod_data_source_block           9
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4023620