Dynamic kinetic asymmetric transfer hydrogenation-cyclization tandem reaction: an easy access to chiral 3,4-dihydro-2H-pyran-carbonitriles
Zheng, Dongsong; Zhao, Qiankun; Hu, Xiaoying; Cheng, Tanyu; Liu, Guohua; Wang, Wei; Chem. Commun.  (2017) –; doi:10.1039/C7CC02156A

data_7120120
_publ_section_title
;
 Dynamic kinetic asymmetric transfer hydrogenation-cyclization tandem
 reaction: an easy access to chiral 3,4-dihydro-2H-pyran-carbonitriles
;
_journal_name_full               'Chem. Commun.'
_journal_paper_doi               10.1039/C7CC02156A
_journal_year                    2017
_chemical_absolute_configuration unk
_chemical_formula_sum            'C19 H18 N2 O2'
_chemical_formula_weight         306.35
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2016-10-28 deposited with the CCDC.
2017-05-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 94.477(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.7979(17)
_cell_length_b                   6.8652(12)
_cell_length_c                   12.478(2)
_cell_measurement_reflns_used    1278
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      41.628
_cell_measurement_theta_min      5.097
_cell_volume                     836.8(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0263
_diffrn_reflns_av_unetI/netI     0.0432
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            5058
_diffrn_reflns_point_group_measured_fraction_full 0.942
_diffrn_reflns_point_group_measured_fraction_max 0.937
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.999
_diffrn_reflns_theta_min         1.637
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6278
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.216
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             324
_exptl_crystal_size_max          0.220
_exptl_crystal_size_mid          0.170
_exptl_crystal_size_min          0.110
_refine_diff_density_max         0.147
_refine_diff_density_min         -0.112
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details
; 
 Flack x determined using 872 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons and Flack (2004), Acta Cryst. A60, s61). 
;
_refine_ls_abs_structure_Flack   -2.7(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         3081
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0618
_refine_ls_R_factor_gt           0.0462
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0539P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1021
_refine_ls_wR_factor_ref         0.1106
_reflns_Friedel_coverage         0.723
_reflns_Friedel_fraction_full    0.873
_reflns_Friedel_fraction_max     0.863
_reflns_number_gt                2439
_reflns_number_total             3081
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7cc02156a2.cif
_cod_data_source_block           cd15358
_cod_database_code               7120120
_shelx_estimated_absorpt_t_min   0.983
_shelx_estimated_absorpt_t_max   0.991
_shelxl_version_number           2013-4
_shelx_res_checksum              94258