Synthesis of 1,3-diazepines and ring contraction to cyanopyrroles.
Reisinger, Ales; Bernhardt, Paul V.; Wentrup, Curt; Organic & biomolecular chemistry 2 (2004) 246–256; doi:10.1039/b311247k

data_7150318
_publ_section_title
;
 Synthesis of 1,3-diazepines and ring contraction to cyanopyrroles.
;
_journal_issue                   2
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              246
_journal_page_last               256
_journal_paper_doi               10.1039/b311247k
_journal_volume                  2
_journal_year                    2004
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C25 H38 N6'
_chemical_formula_structural     'C25 H38 N6'
_chemical_formula_sum            'C25 H38 N6'
_chemical_formula_weight         422.61
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/cifdics/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.1
_audit_creation_date             2003-08-20T16:34:20-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                65.573(6)
_cell_angle_beta                 79.700(6)
_cell_angle_gamma                63.521(6)
_cell_formula_units_Z            2
_cell_length_a                   10.9884(9)
_cell_length_b                   11.953(1)
_cell_length_c                   12.2879(8)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      13.267
_cell_measurement_theta_min      10.322
_cell_measurement_wavelength     0.71073
_cell_volume                     1315.3(2)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector                 'scintillation LiI'
_diffrn_detector_dtime           1.195
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Enraf Nonius TurboCAD4'
_diffrn_measurement_method       'non-profiled omega/2theta scans'
_diffrn_orient_matrix_type
;
x-axis points to radiation source
the matrix is specified in reciprocal space
;
_diffrn_orient_matrix_UB_11      -0.38257E-1
_diffrn_orient_matrix_UB_12      0.53091E-1
_diffrn_orient_matrix_UB_13      0.52535E-1
_diffrn_orient_matrix_UB_21      -0.06044
_diffrn_orient_matrix_UB_22      -0.48146E-1
_diffrn_orient_matrix_UB_23      0.38726E-1
_diffrn_orient_matrix_UB_31      0.72255E-1
_diffrn_orient_matrix_UB_32      -0.71174E-1
_diffrn_orient_matrix_UB_33      0.61072E-1
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0442
_diffrn_reflns_av_unetI/netI     0.0297
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            4922
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         1.82
_diffrn_source                   'Enraf Nonius FR590'
_diffrn_standards_decay_%        6
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  0.9988
_exptl_absorpt_correction_T_min  0.9501
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
;
North A.C.T., Phillips D.C. & Mathews F.S. (1968) Acta. Cryst. A24, 351
Number of psi-scan sets used was   2
Theta correction was applied.
Averaged transmission function was used.
No Fourier smoothing was applied.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.067
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             460
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.336
_refine_diff_density_min         -0.294
_refine_diff_density_rms         0.04
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     282
_refine_ls_number_reflns         4622
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0987
_refine_ls_R_factor_gt           0.0577
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0940P)^2^+0.3557P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1555
_refine_ls_wR_factor_ref         0.1826
_reflns_number_gt                2840
_reflns_number_total             4622
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b311247k.txt
_cod_data_source_block           1420ar2
_cod_database_code               7150318
_exptl_absorpt_factor_mur        0
_exptl_absorpt_correction_t_ave  0.9669
_diffrn_standards_decay_corr_max 1.115
_diffrn_standards_decay_corr_min 0.978