Origins of selectivity in Brønsted acid-promoted diazoalkane-azomethine reactions (the aza-Darzens aziridine synthesis).
Troyer, Timothy L.; Muchalski, Hubert; Hong, Ki Bum; Johnston, Jeffrey N.; Organic letters 13 (2011) 1790–1792; doi:10.1021/ol200313m

data_1502077
_publ_section_title
;
 Origins of selectivity in Br\/onsted acid-promoted diazoalkane-azomethine
 reactions (the aza-Darzens aziridine synthesis).
;
_journal_issue                   7
_journal_name_full               'Organic letters'
_journal_page_first              1790
_journal_page_last               1792
_journal_paper_doi               10.1021/ol200313m
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C15 H19 N O4'
_chemical_formula_sum            'C15 H19 N O4'
_chemical_formula_weight         277.31
_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                 98.460(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.5539(10)
_cell_length_b                   9.0119(17)
_cell_length_c                   14.952(3)
_cell_measurement_reflns_used    1604
_cell_measurement_temperature    130(2)
_cell_measurement_theta_max      22.8
_cell_measurement_theta_min      2.6
_cell_volume                     740.2(2)
_computing_cell_refinement       'SAINT (Bruker, 2003)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 2003)'
_computing_molecular_graphics    'SHELXTL (Bruker, 2003), XTEL (loc. libr.)'
_computing_publication_material  'SHELXTL (Bruker, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-2004 (Burla et al., 2005)'
_diffrn_ambient_temperature      130(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 44.52
_diffrn_detector_type            'Bruker SMART 6000'
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_details
'0.30 degree frames measured for 15 seconds each'
_diffrn_measurement_device       'three-circle goniometer with fixed chi'
_diffrn_measurement_device_type  'Bruker Platform goniometer'
_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  0.0573
_diffrn_reflns_av_sigmaI/netI    0.0581
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            10076
_diffrn_reflns_theta_full        26.55
_diffrn_reflns_theta_max         26.55
_diffrn_reflns_theta_min         2.65
_diffrn_standards_decay_%        0.0
_diffrn_standards_interval_time  758
_diffrn_standards_number         23
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9866
_exptl_absorpt_correction_T_min  0.9822
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing; 1995'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             296
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.386
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.057
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.9(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     184
_refine_ls_number_reflns         3050
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0689
_refine_ls_R_factor_gt           0.0508
_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^)+(0.0799P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1235
_refine_ls_wR_factor_ref         0.1354
_reflns_number_gt                2449
_reflns_number_total             3050
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol200313m_si_002.cif
_cod_data_source_block           06155
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'multi-scans' was replaced
with the value 'multi-scan' as specified in the replacement file
'src/cod-tools/trunk/data/replacement-values/replacement_values.lst'.

Automatic conversion script
Id: cif_fix_values 5376 2017-05-30 11:51:03Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1502077