One-step synthesis of complex nitrogen heterocycles from imines and alkyl-substituted maleic anhydrides.
Tang, Yuchen; Fettinger, James C.; Shaw, Jared T.; Organic letters 11 (2009) 3802–3805; doi:10.1021/ol901018k

data_1503988
_publ_section_title
;
 One-step synthesis of complex nitrogen heterocycles from imines and
 alkyl-substituted maleic anhydrides.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              3802
_journal_page_last               3805
_journal_paper_doi               10.1021/ol901018k
_journal_volume                  11
_journal_year                    2009
_chemical_formula_moiety         'C18 H16 N2 O3'
_chemical_formula_sum            'C18 H16 N2 O3'
_chemical_formula_weight         308.33
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 95.112(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.450(5)
_cell_length_b                   8.5899(17)
_cell_length_c                   6.9140(14)
_cell_measurement_reflns_used    9961
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.51
_cell_volume                     1446.3(5)
_computing_cell_refinement       'SAINT (7.46A) (Bruker, 2006)'
_computing_data_collection       'SMART (Version 5.054) (Bruker, 2002)'
_computing_data_reduction        'SAINT (7.46A) (Bruker, 2006)'
_computing_molecular_graphics    'SHELXTL 5.1, XP (Sheldrick, 1994)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART1000 CCD'
_diffrn_measurement_method       '\w and \f'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0360
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3960
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         0.84
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9794
_exptl_absorpt_correction_T_min  0.9590
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'TWINABS V2008/3 (Sheldrick, 2008)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.416
_exptl_crystal_description       Block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.261
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.102
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         3960
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.102
_refine_ls_R_factor_all          0.0472
_refine_ls_R_factor_gt           0.0419
_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^)+(0.0489P)^2^+0.8170P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1137
_refine_ls_wR_factor_ref         0.1178
_reflns_number_gt                3575
_reflns_number_total             3960
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol901018k_si_006.cif
_cod_data_source_block           tw51
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1503988