Direct asymmetric aldol addition-isomerization of alpha,beta-unsaturated gamma-butyrolactam with aryl alpha-ketoesters: synthesis of MBH-type products
Jinlong Zhang; Xihong Liu; Xiaojuan Ma; Rui Wang; Chem.Commun. 49 (2013) 3300–; doi:10.1039/c3cc40717a

data_7109082
_publ_section_title
;
 Direct asymmetric aldol addition-isomerization of alpha,beta-unsaturated
 gamma-butyrolactam with aryl alpha-ketoesters: synthesis of MBH-type
 products
;
_journal_name_full               Chem.Commun.
_journal_page_first              3300
_journal_paper_doi               10.1039/c3cc40717a
_journal_volume                  49
_journal_year                    2013
_chemical_formula_sum            'C20 H25 N O6'
_chemical_formula_weight         375.41
_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                 94.403(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.941(4)
_cell_length_b                   7.947(3)
_cell_length_c                   12.485(4)
_cell_measurement_temperature    296(2)
_cell_volume                     983.4(6)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART APEX II'
_computing_data_reduction        'Bruker SMART'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker APEX II area detector'
_diffrn_measurement_method       '\w 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  0.0148
_diffrn_reflns_av_sigmaI/netI    0.0247
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            6381
_diffrn_reflns_theta_full        24.99
_diffrn_reflns_theta_max         24.99
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9861
_exptl_absorpt_correction_T_min  0.9815
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    1.268
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             400
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.142
_refine_diff_density_min         -0.116
_refine_diff_density_rms         0.029
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     250
_refine_ls_number_reflns         3376
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0372
_refine_ls_R_factor_gt           0.0326
_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^)+(0.0800P)^2^+0.0070P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0982
_refine_ls_wR_factor_ref         0.1070
_reflns_number_gt                3109
_reflns_number_total             3376
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc40717a.txt
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7109082