Synthesis of 3,4-Disubstituted Piperidines by Carbonyl Ene and Prins Cyclizations: Switching between Kinetic and Thermodynamic Control with Brønsted and Lewis Acid Catalysts
Jodi T. Williams; Perdip S. Bahia; Benson M. Kariuki; Neil Spencer; Douglas Philp; John S. Snaith; Journal of Organic Chemistry 71 (2006) 2460–2471; doi:10.1021/jo052532+

data_4021563
_publ_contact_author
;
J.S. Snaith,
School of Chemistry,
University of Birmingham,
Edgbaston, Birmingham, B15 2TT, UK
;
_publ_contact_author_email       j.s.snaith@bham.ac.uk
_publ_section_title
;
 Synthesis of 3,4-Disubstituted Piperidines by Carbonyl Ene and
 Prins Cyclizations: Switching between Kinetic and Thermodynamic
 Control with Br\/onsted and Lewis Acid Catalysts
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2460
_journal_page_last               2471
_journal_paper_doi               10.1021/jo052532+
_journal_volume                  71
_journal_year                    2006
_chemical_formula_moiety         'C22 H30 Cl N O3 S'
_chemical_formula_sum            'C22 H30 Cl N O3 S'
_chemical_formula_weight         423.98
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 92.895(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.2907(7)
_cell_length_b                   25.267(2)
_cell_length_c                   9.8863(10)
_cell_measurement_reflns_used    3458
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      70.52
_cell_measurement_theta_min      3.50
_cell_volume                     2068.4(3)
_computing_cell_refinement       SAINTPLUS
_computing_data_collection       SMART
_computing_data_reduction        SAINTPLUS
_computing_structure_refinement  SHELXTL
_computing_structure_solution    SHELXTL
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.942
_diffrn_measured_fraction_theta_max 0.942
_diffrn_measurement_device_type  'Bruker Smart 6000 CCD'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0214
_diffrn_reflns_av_sigmaI/netI    0.0162
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            13148
_diffrn_reflns_theta_full        70.52
_diffrn_reflns_theta_max         70.52
_diffrn_reflns_theta_min         3.50
_exptl_absorpt_coefficient_mu    2.764
_exptl_absorpt_correction_T_max  0.5567
_exptl_absorpt_correction_T_min  0.4044
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Sadabs in SaintPlus'
_exptl_crystal_colour            clear
_exptl_crystal_density_diffrn    1.362
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.233
_refine_diff_density_min         -0.309
_refine_diff_density_rms         0.039
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         3728
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0368
_refine_ls_R_factor_gt           0.0346
_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^)+(0.0552P)^2^+0.5947P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0975
_refine_ls_wR_factor_ref         0.0996
_reflns_number_gt                3458
_reflns_number_total             3728
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo052532+si20051208_100457.cif
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4021563