Biomimetic Approach toward the Total Synthesis of rac-2-(Acylmethylene)pyrrolidine Alkaloids.
Shih, Yu-Chiao; Tsai, Pei-Hua; Hsu, Chia-Chun; Chang, Chih-Wei; Jhong, Yuandong; Chen, Yun-Chung; Chien, Tun-Cheng; The Journal of organic chemistry 80 (2015) 6669–6678; doi:10.1021/acs.joc.5b00836

data_4031124
_publ_section_title
;
 Biomimetic Approach toward the Total Synthesis of
 rac-2-(Acylmethylene)pyrrolidine Alkaloids.
;
_journal_issue                   13
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              6669
_journal_page_last               6678
_journal_paper_doi               10.1021/acs.joc.5b00836
_journal_volume                  80
_journal_year                    2015
_chemical_formula_moiety         'C15 H18 N2'
_chemical_formula_sum            'C15 H18 N2'
_chemical_formula_weight         226.31
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.537(3)
_cell_length_b                   8.819(5)
_cell_length_c                   25.832(16)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     1261.4(13)
_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-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0803
_diffrn_reflns_av_sigmaI/netI    0.1294
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            5556
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         2.80
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  0.9979
_exptl_absorpt_correction_T_min  0.9784
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.192
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.193
_refine_diff_density_min         -0.201
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -7(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.981
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     154
_refine_ls_number_reflns         2199
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.981
_refine_ls_R_factor_all          0.1531
_refine_ls_R_factor_gt           0.0593
_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^)+(0.0531P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1119
_refine_ls_wR_factor_ref         0.1459
_reflns_number_gt                1107
_reflns_number_total             2199
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo5b00836_si_002.cif
_cod_data_source_block           ch14335
_cod_depositor_comments          'Adding full bibliography for 4031124.cif.'
_cod_original_cell_volume        1261.3(13)
_cod_database_code               4031124