Straightforward Methodology for the Enantioselective Synthesis of Benzo[a]- and Indolo[2,3-a]quinolizidines
Mercedes Amat; María M. M. Santos; Oriol Bassas; Núria Llor; Carmen Escolano; Arantxa Gómez-Esqué; Elies Molins; Steven M. Allin; Vickie McKee; Joan Bosch; Journal of Organic Chemistry 72 (2007) 5193–5201; doi:10.1021/jo070539g

data_4023985
_publ_section_title
;
 Straightforward Methodology for the Enantioselective Synthesis of
 Benzo[a]- and Indolo[2,3-a]quinolizidines
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5193
_journal_page_last               5201
_journal_paper_doi               10.1021/jo070539g
_journal_volume                  72
_journal_year                    2007
_chemical_absolute_configuration syn
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C18 H22 N2 O2'
_chemical_formula_sum            'C18 H22 N2 O2'
_chemical_formula_weight         298.38
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_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   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.2
_audit_creation_date             2004-09-06T17:46:23-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 98.726(19)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.4590(18)
_cell_length_b                   6.823(3)
_cell_length_c                   15.722(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      18.05
_cell_measurement_theta_min      12.75
_cell_measurement_wavelength     0.71073
_cell_volume                     790.9(4)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      294(2)
_diffrn_detector                 'scintillation LiI'
_diffrn_detector_dtime           1.195
_diffrn_measured_fraction_theta_full 1
_diffrn_measured_fraction_theta_max 1
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Enraf Nonius CAD4'
_diffrn_measurement_method       'non-profiled omega scans'
_diffrn_orient_matrix_type
;
  x-axis points to radiation source
  the matrix is specified in reciprocal space
;
_diffrn_orient_matrix_UB_11      0.064639
_diffrn_orient_matrix_UB_12      0.010672
_diffrn_orient_matrix_UB_13      -0.051075
_diffrn_orient_matrix_UB_21      0.117629
_diffrn_orient_matrix_UB_22      0.018331
_diffrn_orient_matrix_UB_23      0.039129
_diffrn_orient_matrix_UB_31      0.019561
_diffrn_orient_matrix_UB_32      -0.145013
_diffrn_orient_matrix_UB_33      0.001173
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.027
_diffrn_reflns_av_unetI/netI     0.0333
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1565
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         1.31
_diffrn_source                   'Enraf Nonius FR590'
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             320
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.167
_refine_diff_density_min         -0.241
_refine_diff_density_rms         0.05
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     201
_refine_ls_number_reflns         1510
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0745
_refine_ls_R_factor_gt           0.0529
_refine_ls_shift/su_max          0.023
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0835P)^2^+0.1522P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1291
_refine_ls_wR_factor_ref         0.141
_reflns_number_gt                1215
_reflns_number_total             1510
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo070539grom20070315_094520.cif
_cod_data_source_block           jb41
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               4023985
_diffrn_standards_decay_corr_max 1
_diffrn_standards_decay_corr_min 1