Synthesis of Enantiomerically Pure 3-Substituted Piperazine-2-acetic Acid Esters as Intermediates for Library Production.
Reddy Guduru, Shiva Krishna; Chamakuri, Srinivas; Raji, Idris O.; MacKenzie, Kevin R.; Santini, Conrad; Young, Damian W.; The Journal of organic chemistry 83 (2018) 11777–11793; doi:10.1021/acs.joc.8b01708

data_4035260
_publ_section_title
;
 Synthesis of Enantiomerically Pure 3-Substituted Piperazine-2-acetic Acid
 Esters as Intermediates for Library Production.
;
_journal_issue                   19
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              11777
_journal_page_last               11793
_journal_paper_doi               10.1021/acs.joc.8b01708
_journal_volume                  83
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_sum            'C26 H33 N3 O8 S'
_chemical_formula_weight         547.61
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_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                   8.6172(2)
_cell_length_b                   11.8985(4)
_cell_length_c                   27.2367(8)
_cell_measurement_reflns_used    8005
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      66.70
_cell_measurement_theta_min      3.25
_cell_volume                     2792.63(14)
_computing_cell_refinement       'SAINT v7.60A (Bruker-Nonius, 2013)'
_computing_data_collection       'APEX2 v2013.4-1 (Bruker-Nonius, 2013)'
_computing_data_reduction        'SAINT v7.60A (Bruker-Nonius, 2013)'
_computing_structure_refinement  'SHELXL v6.12 (G.M. Sheldrick, 2001)'
_computing_structure_solution    'SHELXS v6.12 (G.M. Sheldrick, 2001)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 4K
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_measurement_device_type  'Bruker DUO APEX II CCD'
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Incoatec 30 Watt Cu microsource'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0217
_diffrn_reflns_av_sigmaI/netI    0.0142
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            19320
_diffrn_reflns_theta_full        66.70
_diffrn_reflns_theta_max         66.70
_diffrn_reflns_theta_min         3.25
_diffrn_standards_decay_%        0.0
_exptl_absorpt_coefficient_mu    1.472
_exptl_absorpt_correction_T_max  0.7528
_exptl_absorpt_correction_T_min  0.5816
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SAINT v7.60A'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thin plate'
_exptl_crystal_F_000             1160
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.206
_refine_diff_density_min         -0.219
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.001(9)
_refine_ls_extinction_coef       0.00128(9)
_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   1.055
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     348
_refine_ls_number_reflns         4761
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0210
_refine_ls_R_factor_gt           0.0208
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0315P)^2^+0.5879P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0561
_refine_ls_wR_factor_ref         0.0562
_reflns_number_gt                4729
_reflns_number_total             4784
_reflns_threshold_expression     >3.99sigma(I)
_cod_data_source_file            jo8b01708_si_003.cif
_cod_data_source_block           k1608
_cod_depositor_comments
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The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Empirical' was
changed to 'empirical' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

data item '_symmetry_cell_setting' value 'Orthorhombic' was changed
to 'orthorhombic' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
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_cod_database_code               4035260