Enantioselective reductive coupling of 1,3-enynes to glyoxalates mediated by hydrogen: asymmetric synthesis of beta,gamma-unsaturated alpha-hydroxy esters.
Hong, Young-Taek; Cho, Chang-Woo; Skucas, Eduardas; Krische, Michael J.; Organic letters 9 (2007) 3745–3748; doi:10.1021/ol7015548

data_1505521
_publ_section_title
;
 Enantioselective reductive coupling of 1,3-enynes to glyoxalates mediated
 by hydrogen: asymmetric synthesis of beta,gamma-unsaturated alpha-hydroxy
 esters.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              3745
_journal_page_last               3748
_journal_paper_doi               10.1021/ol7015548
_journal_volume                  9
_journal_year                    2007
_chemical_absolute_configuration syn
_chemical_formula_sum            'C24 H23 N O2'
_chemical_formula_weight         357.43
_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   geom
_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                   5.84900(10)
_cell_length_b                   16.3630(4)
_cell_length_c                   20.7290(5)
_cell_measurement_reflns_used    2640
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     1983.91(8)
_computing_cell_refinement       'Collect software, Nonius B.V. 1998'
_computing_data_collection       'Collect software, Nonius B.V. 1998'
_computing_data_reduction
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_computing_molecular_graphics    'XP SHELXTL/PC, Siemens Analytical'
_computing_structure_refinement  'XL SHELXTL/PC, Siemens Analytical'
_computing_structure_solution
;

SIR97 - Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C., 
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
;
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0704
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            4537
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.33
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needles
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.223
_refine_diff_density_min         -0.202
_refine_diff_density_rms         0.052
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.9(15)
_refine_ls_extinction_coef       0.0091(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     337
_refine_ls_number_reflns         4537
_refine_ls_number_restraints     162
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.1029
_refine_ls_R_factor_gt           0.0525
_refine_ls_shift/su_max          0.090
_refine_ls_shift/su_mean         0.005
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0472P)^2^+0.3294P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1014
_refine_ls_wR_factor_ref         0.1175
_reflns_number_gt                2966
_reflns_number_total             4537
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7015548-file002.cif
_cod_data_source_block           hyt567
_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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               1505521