Highly enantioselective [4+2] annulation via organocatalytic Mannich-reductive cyclization: one-pot synthesis of functionalized piperidines
Indresh Kumar; Panduga Ramaraju; Nisar A. Mir; Deepika Singh; Vivek K. Gupta; Chem.Commun. 49 (2013) 5645–; doi:10.1039/c3cc42431f

data_7109385
_publ_section_title
;
 Highly enantioselective [4+2] annulation via organocatalytic
 Mannich-reductive cyclization: one-pot synthesis of functionalized
 piperidines
;
_journal_name_full               Chem.Commun.
_journal_page_first              5645
_journal_paper_doi               10.1039/c3cc42431f
_journal_volume                  49
_journal_year                    2013
_chemical_formula_moiety         'C18 H22 N2 O2'
_chemical_formula_sum            'C18 H22 N2 O2'
_chemical_formula_weight         298.38
_chemical_name_systematic
;
((2S, 3S)-1-(4-methoxyphenyl)-2-(pyridin-4-yl)piperidin-3-yl)methanol
;
_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   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 107.577(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.1775(2)
_cell_length_b                   10.7628(2)
_cell_length_c                   16.9499(5)
_cell_measurement_reflns_used    19712
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.1436
_cell_measurement_theta_min      3.4308
_cell_volume                     1596.07(7)
_computing_cell_refinement       'CrysAlisPro (Oxford Diffraction,2010)'
_computing_data_collection       'CrysAlisPro (Oxford Diffraction,2010)'
_computing_data_reduction        'CrysAlisPro (Oxford Diffraction,2010)'
_computing_molecular_graphics    'ORTEP3 (Farrugia, 1997)'
_computing_publication_material  PLATON(Spek,2009)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.1049
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_diffrn_measurement_method       'omega scans'
_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  0.0621
_diffrn_reflns_av_sigmaI/netI    0.0423
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            46265
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.44
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.90642
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.

;
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.242
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.190
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.5(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     453
_refine_ls_number_reflns         5604
_refine_ls_number_restraints     269
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0799
_refine_ls_R_factor_gt           0.0526
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0747P)^2^+0.0278P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1239
_refine_ls_wR_factor_ref         0.1359
_reflns_number_gt                4066
_reflns_number_total             5604
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc42431f.cif
_cod_data_source_block           indresh2
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7109385