Solid-phase Synthesis of Hybrid 2,5-Diketopiperazines Using Acylhydrazide, Carbazate, Semicarbazide, Amino Acid and Primary Amine Submonomers.
Rahim, Abdur; Sahariah, Biswajit; Baruah, Kalpita; Deka, Jugal Kishore Rai; Sarma, Bani Kanta; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.9b02083

data_4037906
_publ_section_title
;
 Solid-phase Synthesis of Hybrid 2,5-Diketopiperazines Using
 Acylhydrazide, Carbazate, Semicarbazide, Amino Acid and Primary Amine
 Submonomers.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.9b02083
_journal_year                    2020
_chemical_formula_moiety         'C15 H19 N3 O3'
_chemical_formula_sum            'C15 H19 N3 O3'
_chemical_formula_weight         289.33
_chemical_name_systematic        N-(4-isobutyl-2,5-dioxopiperazin-1-yl)benzamide
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2019-12-31 deposited with the CCDC.	2019-12-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.803(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.9113(4)
_cell_length_b                   8.8360(5)
_cell_length_c                   30.1022(19)
_cell_measurement_reflns_used    1743
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      26.371
_cell_measurement_theta_min      2.402
_cell_volume                     1571.53(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      297(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker PHOTON100 CMOS'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0791
_diffrn_reflns_av_unetI/netI     0.0586
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       37
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            20073
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.371
_diffrn_reflns_theta_min         2.402
_diffrn_source                   X-ray
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.847
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_description       Rod
_exptl_crystal_F_000             616.0
_exptl_crystal_size_max          0.178
_exptl_crystal_size_mid          0.062
_exptl_crystal_size_min          0.051
_refine_diff_density_max         0.136
_refine_diff_density_min         -0.152
_refine_diff_density_rms         0.032
_refine_ls_extinction_coef       0.022(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         3221
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.1427
_refine_ls_R_factor_gt           0.0548
_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^)+(0.0828P)^2^+0.2423P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1444
_refine_ls_wR_factor_ref         0.2031
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1445
_reflns_number_total             3224
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo9b02083_si_004.cif
_cod_data_source_block           Comp41_a
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-Scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/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 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4037906
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.978
_shelx_estimated_absorpt_t_max   0.994
_shelx_res_checksum              30541
_shelx_hkl_checksum              30202