The first example of enamine-Lewis acid cooperative bifunctional catalysis: application to the asymmetric aldol reaction.
Arnold, Kenny; Batsanov, Andrei S; Davies, Bryan; Grosjean, Christophe; Schütz, Thorben; Whiting, Andrew; Zawatzky, Kerstin; Chemical communications (Cambridge, England)  (2008) 3879–3881; doi:10.1039/b806779a

data_7103306
_publ_section_title
;
 The first example of enamine-Lewis acid cooperative bifunctional
 catalysis: application to the asymmetric aldol reaction.
;
_journal_issue                   33
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              3879
_journal_page_last               3881
_journal_paper_doi               10.1039/b806779a
_journal_year                    2008
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C10 H20 B N O4'
_chemical_formula_sum            'C10 H20 B N O4'
_chemical_formula_weight         229.08
_chemical_melting_point          373
_chemical_name_common
;(S)-N-(1,1-Dimethylethoxycarbonyl)-(pyrrolidin-2-
yl)methylboronic acid
;
_chemical_name_systematic
; (S)-N-(1,1-Dimethylethoxycarbonyl)-(pyrrolidin-2-
yl)methylboronic acid
;
_chemical_optical_rotation       '[\a]~D~^22^=-60 (c 1.00 in CH~2~Cl~2~)'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.3385(9)
_cell_length_b                   11.5001(11)
_cell_length_c                   12.0643(11)
_cell_measurement_reflns_used    7045
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      28.95
_cell_measurement_theta_min      2.45
_cell_volume                     1295.6(2)
_computing_cell_refinement       'SAINT version 6.45A (Bruker, 2003)'
_computing_data_collection       'SMART version 5.049 (Bruker, 1998)'
_computing_data_reduction        'SAINT version 6.45A (Bruker, 2003)'
_computing_molecular_graphics    'SHELXTL version 6.14 (Bruker, 2003)'
_computing_publication_material  'SHELXTL version 6.14 (Bruker, 2003)'
_computing_structure_refinement  'SHELXTL version 6.14 (Bruker, 2003)'
_computing_structure_solution    'SHELXTL version 6.14 (Bruker, 2003)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Siemens SMART 1K CCD 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  0.0370
_diffrn_reflns_av_sigmaI/netI    0.0230
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            13209
_diffrn_reflns_theta_full        28.96
_diffrn_reflns_theta_max         28.96
_diffrn_reflns_theta_min         2.45
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.8742
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2.10 (Bruker, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.174
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             496
_exptl_crystal_size_max          0.75
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.175
_refine_diff_density_min         -0.165
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details
'undeterminable, all \Df" set to 0, Friedel equivalents merged'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         1968
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0355
_refine_ls_R_factor_gt           0.0306
_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^)+(0.0469P)^2^+0.0994P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0747
_refine_ls_wR_factor_ref         0.0768
_reflns_Friedel_coverage         0.74
_reflns_number_gt                1798
_reflns_number_total             1968
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b806779a.txt
_cod_data_source_block           (S)-6
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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_database_code               7103306