One-pot tandem cyclisation to pyrrolo[1,2-a][1,4]benzodiazepines: a modified approach to the Pictet-Spengler reaction.
Ali, Sk Asraf; Mondal, Suresh Kumar; Das, Tapas; Manna, Susanta Kumar; Bera, Anirban; Dafadar, Debabrata; Naskar, Sourenjit; Molla, Mijanur Rahaman; Samanta, Shubhankar; Organic & biomolecular chemistry 17 (2019) 4652–4662; doi:10.1039/c9ob00448c

data_7156809
_publ_section_title
;
 One-pot tandem cyclisation to pyrrolo[1,2-a][1,4]benzodiazepines: a
 modified approach to the Pictet-Spengler reaction.
;
_journal_issue                   18
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              4652
_journal_page_last               4662
_journal_paper_doi               10.1039/c9ob00448c
_journal_volume                  17
_journal_year                    2019
_chemical_formula_moiety         'C30 H28 N2 O2'
_chemical_formula_sum            'C30 H28 N2 O2'
_chemical_formula_weight         448.54
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-01-31
_audit_creation_method
;
Olex2 1.2
(compiled 2016.09.09 svn.r3337 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-02-18 deposited with the CCDC.    2019-04-11 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 106.043(8)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.470(3)
_cell_length_b                   11.660(2)
_cell_length_c                   16.913(4)
_cell_measurement_reflns_used    9103
_cell_measurement_temperature    158(2)
_cell_measurement_theta_max      27.38
_cell_measurement_theta_min      2.52
_cell_volume                     2363.4(9)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      158.0
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0788
_diffrn_reflns_av_unetI/netI     0.0633
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            24223
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.478
_diffrn_reflns_theta_min         2.517
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6118
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1287 before and 0.1000 after correction. The Ratio of minimum to maximum transmission is 0.8205. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.261
_exptl_crystal_description       block
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.334
_refine_diff_density_min         -0.336
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         5358
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0751
_refine_ls_R_factor_gt           0.0563
_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^)+(0.0666P)^2^+0.9189P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1389
_refine_ls_wR_factor_ref         0.1541
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4151
_reflns_number_total             5358
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9ob00448c2.cif
_cod_data_source_block           mo_pg020118_0m
_cod_depositor_comments          'Adding full bibliography for 7156809.cif.'
_cod_original_cell_volume        2363.3(9)
_cod_database_code               7156809
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.983
_shelx_estimated_absorpt_t_min   0.971
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C10(H10A,H10B), C15(H15A,H15B), C16(H16A,H16B)
2.c Aromatic/amide H refined with riding coordinates:
 N2(H2), C11(H11), C12(H12), C13(H13), C14(H14), C19(H19), C20(H20), C21(H21),
 C22(H22), C24(H24), C25(H25), C27(H27), C28(H28)
2.d Idealised Me refined as rotating group:
 C29(H29A,H29B,H29C), C30(H30A,H30B,H30C)
;
_shelx_res_checksum              25755
_olex2_submission_special_instructions 'No special instructions were received'