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_7159209
_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_formula_moiety         'C15 H25 N O4'
_chemical_formula_sum            'C15 H25 N O4'
_chemical_formula_weight         283.36
_chemical_name_common
'(ethyl (2E,4E)-6-((tert-butoxycarbonyl)amino)-6-methylhepta-2,4-dienoate)'
_chemical_name_systematic
'(ethyl (2E,4E)-6-((tert-butoxycarbonyl)amino)-6-methylhepta-2,4-dienoate)'
_space_group_crystal_system      monoclinic
_space_group_IT_number           7
_space_group_name_Hall           'P -2yc'
_space_group_name_H-M_alt        'P 1 c 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                 100.338(6)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.1906(18)
_cell_length_b                   18.987(4)
_cell_length_c                   9.7142(16)
_cell_measurement_reflns_used    8309
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.422
_cell_measurement_theta_min      2.253
_cell_volume                     1667.6(6)
_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 0.999
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  microfocus
_diffrn_measurement_method       APEXIII
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1210
_diffrn_reflns_av_unetI/netI     0.1036
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            63821
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.422
_diffrn_reflns_theta_min         2.253
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.982
_exptl_absorpt_correction_T_min  0.971
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS,2008
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.129
_exptl_crystal_description       plate-shape
_exptl_crystal_F_000             616.0
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.749
_refine_diff_density_min         -0.406
_refine_diff_density_rms         0.067
_refine_ls_abs_structure_details
;
 Flack x determined using 1774 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -1.3(10)
_refine_ls_extinction_coef       0.0038(8)
_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   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     374
_refine_ls_number_reflns         8309
_refine_ls_number_restraints     560
_refine_ls_restrained_S_all      0.997
_refine_ls_R_factor_all          0.1649
_refine_ls_R_factor_gt           0.0866
_refine_ls_shift/su_max          0.088
_refine_ls_shift/su_mean         0.015
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0139P)^2^+3.9758P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1342
_refine_ls_wR_factor_ref         0.1628
_reflns_Friedel_coverage         0.983
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.983
_reflns_number_gt                4964
_reflns_number_total             8309
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3ob00090g2.cif
_cod_data_source_block           5c
_cod_depositor_comments
'Adding full bibliography for 7159200--7159209.cif.'
_cod_original_cell_volume        1667.6(5)
_cod_original_sg_symbol_H-M      'P c'
_cod_database_code               7159209
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.971
_shelx_estimated_absorpt_t_max   0.982
_exptl_absorpt_special_details   multi-scan
_shelx_res_checksum              54494