Organocatalytic [4 + 2] cyclocondensation of α,β-unsaturated acyl chlorides with imines: highly enantioselective synthesis of dihydropyridinone and piperidine derivatives.
Jia, Wen-Qiang; Chen, Xiang-Yu; Sun, Li-Hui; Ye, Song; Organic & biomolecular chemistry 12 (2014) 2167–2171; doi:10.1039/c4ob00114a

data_7153697
_publ_section_title
;
 Organocatalytic [4 + 2] cyclocondensation of \a,\b-unsaturated acyl
 chlorides with imines: highly enantioselective synthesis of
 dihydropyridinone and piperidine derivatives.
;
_journal_issue                   14
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2167
_journal_page_last               2171
_journal_paper_doi               10.1039/c4ob00114a
_journal_volume                  12
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C12 H12 Cl3 N O'
_chemical_formula_sum            'C12 H12 Cl3 N O'
_chemical_formula_weight         292.58
_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            8
_cell_length_a                   9.4908(18)
_cell_length_b                   11.747(2)
_cell_length_c                   23.965(5)
_cell_measurement_reflns_used    7753
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      1.70
_cell_volume                     2671.8(9)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'Olex2 ver 1.1'
_computing_publication_material  'SHELX97 (Sheldrick, 2008)'
_computing_structure_refinement  'Olex2 ver 1.1'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0404
_diffrn_reflns_av_sigmaI/netI    0.0365
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            16984
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.31
_exptl_absorpt_coefficient_mu    0.668
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.5523
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.455
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.72
_exptl_crystal_size_mid          0.70
_exptl_crystal_size_min          0.60
_refine_diff_density_max         0.318
_refine_diff_density_min         -0.227
_refine_diff_density_rms         0.054
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.109
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         6075
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.109
_refine_ls_R_factor_all          0.0386
_refine_ls_R_factor_gt           0.0374
_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^)+(0.0415P)^2^+0.5879P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0947
_refine_ls_wR_factor_ref         0.0953
_reflns_number_gt                5932
_reflns_number_total             6075
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ob00114a2.cif
_cod_data_source_block           sa2772
_cod_original_cell_volume        2671.9(9)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7153697