Tetrahydro-4 H-(pyrrolo[3,4- d]isoxazol-3-yl)methanamine: A Bicyclic Diamino Scaffold Stabilizing Parallel Turn Conformations.
Bucci, Raffaella; Giofré, Sabrina; Clerici, Francesca; Contini, Alessandro; Pinto, Andrea; Erba, Emanuela; Soave, Raffaella; Pellegrino, Sara; Gelmi, Maria Luisa; The Journal of organic chemistry 83 (2018) 11493–11501; doi:10.1021/acs.joc.8b01299

data_4035197
_publ_section_title
;
 Tetrahydro-4 H-(pyrrolo[3,4- d]isoxazol-3-yl)methanamine: A Bicyclic
 Diamino Scaffold Stabilizing Parallel Turn Conformations.
;
_journal_issue                   19
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              11493
_journal_page_last               11501
_journal_paper_doi               10.1021/acs.joc.8b01299
_journal_volume                  83
_journal_year                    2018
_chemical_absolute_configuration syn
_chemical_formula_sum            'C18 H25 N3 O3'
_chemical_formula_weight         331.42
_chemical_name_systematic
;
t-Butyl 1-(3aR,5,6,6aS-tetrahydro-4H-pyrrolo[3,4-d]isoxazol-3-yl)-2S-phenylethyl)carbamate
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             05/04/2018
_audit_creation_method           SHELXL-2016
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.2524(7)
_cell_length_b                   11.1911(8)
_cell_length_c                   17.8291(13)
_cell_measurement_reflns_used    366
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      11.91
_cell_measurement_theta_min      2.28
_cell_volume                     1846.1(2)
_computing_cell_refinement       'SAINT+ (Bruker AXS, Madison (USA) 1994-1996)'
_computing_data_collection       'SAINT+ (Bruker AXS, Madison (USA) 1994-1996)'
_computing_data_reduction        'SAINT+ (Bruker AXS, Madison (USA) 1994-1996)'
_computing_molecular_graphics    'Diamond v3.2i (Brandenburg, 2012)'
_computing_structure_refinement  'SHELXL-2016/4 (Sheldrick, 2016)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker AXS APEX CCD area-detector'
_diffrn_measurement_method       \w-scan
_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  0.0907
_diffrn_reflns_av_unetI/netI     0.0726
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            26453
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.491
_diffrn_reflns_theta_min         2.149
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.7463
_exptl_absorpt_correction_T_min  0.6651
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; Sheldrick, 2004'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.192
_exptl_crystal_description       prism
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.107
_refine_diff_density_min         -0.139
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details
;
 Flack x determined using 480 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -2.3(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.955
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         3831
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.955
_refine_ls_R_factor_all          0.1622
_refine_ls_R_factor_gt           0.0504
_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^)+(0.0669P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1105
_refine_ls_wR_factor_ref         0.1546
_reflns_Friedel_coverage         0.746
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                1567
_reflns_number_total             3831
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b01299_si_001.cif
_cod_data_source_block           AC43C2
_cod_database_code               4035197
_shelx_res_checksum              34867
_shelx_hkl_checksum              7611