Stereoselective synthesis of backbone extended π-conjugated amino esters.
Nalawade, Sachin A.; Singh, Manjeet; Puneeth Kumar, DRGKoppalu R; Dey, Sanjit; Gopi, Hosahudya N.; Organic & biomolecular chemistry 21 (2023) 2586–2595; doi:10.1039/d3ob00090g

data_7159205
_publ_section_title
;
 Stereoselective synthesis of backbone extended &#x3c0;-conjugated amino
 esters.
;
_journal_issue                   12
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2586
_journal_page_last               2595
_journal_paper_doi               10.1039/d3ob00090g
_journal_volume                  21
_journal_year                    2023
_chemical_absolute_configuration S
_chemical_formula_moiety         'C20 H27 N O4'
_chemical_formula_sum            'C20 H27 N O4'
_chemical_formula_weight         345.43
_chemical_name_common
'(ethyl (S,2E,4E)-6-((tert-butoxycarbonyl)amino)-7-phenylhepta-2,4-dienoate)'
_chemical_name_systematic
'(ethyl (S,2E,4E)-6-((tert-butoxycarbonyl)amino)-7-phenylhepta-2,4-dienoate)'
_space_group_crystal_system      monoclinic
_space_group_IT_number           5
_space_group_name_Hall           'C 2y'
_space_group_name_H-M_alt        'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2022-10-17 deposited with the CCDC.	2023-03-01 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.39(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   35.93(5)
_cell_length_b                   5.117(8)
_cell_length_c                   10.707(16)
_cell_measurement_reflns_used    4866
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.351
_cell_measurement_theta_min      1.904
_cell_volume                     1967(5)
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  microfocus
_diffrn_measurement_method       APEXIII
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0730
_diffrn_reflns_av_unetI/netI     0.0642
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -47
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            27968
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.351
_diffrn_reflns_theta_min         1.904
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.976
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS,2008
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.166
_exptl_crystal_description       Plate-shape
_exptl_crystal_F_000             744.0
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.278
_refine_diff_density_min         -0.242
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details
;
 Flack x determined using 1263 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.3(5)
_refine_ls_extinction_coef       0.013(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   0.679
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         4866
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.679
_refine_ls_R_factor_all          0.0863
_refine_ls_R_factor_gt           0.0522
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1096P)^2^+8.0635P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1352
_refine_ls_wR_factor_ref         0.1641
_reflns_Friedel_coverage         0.796
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                3601
_reflns_number_total             4866
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3ob00090g2.cif
_cod_data_source_block           5b
_cod_depositor_comments
'Adding full bibliography for 7159200--7159209.cif.'
_cod_original_sg_symbol_H-M      'C 2'
_cod_database_code               7159205
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.976
_shelx_estimated_absorpt_t_max   0.986
_exptl_absorpt_special_details   multi-scan
_shelx_res_checksum              67727