Cascade Radical Reactions via α-(Arylsulfanyl)imidoyl Radicals: Competitive [4 + 2] and [4 + 1] Radical Annulations of Alkynyl Isothiocyanates with Aryl Radicals
Luisa Benati; Gianluca Calestani; Rino Leardini; Matteo Minozzi; Daniele Nanni; Piero Spagnolo; Samantha Strazzari; Giuseppe Zanardi; Journal of Organic Chemistry 68 (2003) 3454–3464; doi:10.1021/jo0267504

data_4022344
_publ_contact_author
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     Prof. Gianluca Calestani
     Universit\',chr(39),'a di Parma')
     Dipartimento di Chimica Generale ed Inorganica
     Chimica Analitica, Chimica Fisica
     Viale delle Scienze 17/A
     I-43100 Parma
     Italy
;
_publ_contact_author_email       calestg@at@ipruniv.cce.unipr.it
_publ_contact_author_fax         '[039]521 905 556'
_publ_contact_author_phone       '[039]521 905 447'
_publ_section_title
;
 Cascade Radical Reactions via \a-(Arylsulfanyl)imidoyl Radicals:
 Competitive [4 + 2] and [4 + 1] Radical Annulations
 of Alkynyl Isothiocyanates with Aryl Radicals
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3454
_journal_page_last               3464
_journal_paper_doi               10.1021/jo0267504
_journal_volume                  68
_journal_year                    2003
_chemical_formula_sum            'C21 H12 Cl N S'
_chemical_formula_weight         345.85
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             05/09/2002
_audit_creation_method           'ModiCIF v1.02'
_cell_angle_alpha                90.00(0)
_cell_angle_beta                 92.70(6)
_cell_angle_gamma                90.00(0)
_cell_formula_units_Z            4.00
_cell_length_a                   6.976(1)
_cell_length_b                   21.822(4)
_cell_length_c                   10.444(2)
_cell_measurement_reflns_used    30
_cell_measurement_temperature    22
_cell_measurement_theta_max      32.8
_cell_measurement_theta_min      22.3
_cell_volume                     1588.1(5)
_computing_cell_refinement       'Belletti et al., 1993'
_computing_data_collection       'Belletti, Cantoni & Pasquinelli,1993'
_computing_data_reduction        'DIFAU (Belletti et al.)'
_computing_publication_material  'PARST (Nardelli, 1983)'
_computing_structure_refinement  'SHELXS-93 (Sheldrick, 1993)'
_computing_structure_solution    'SIR97 (Altomare et al., 1998)'
_diffrn_ambient_temperature      22
_diffrn_measurement_device       'Siemens AED'
_diffrn_measurement_method       theta/2theta
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         fine-focussealedtube
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0480
_diffrn_reflns_av_sigmaI/netI    0.0319
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3180
_diffrn_reflns_theta_max         70.56
_diffrn_reflns_theta_min         4.05
_diffrn_standards_decay_%        .12
_diffrn_standards_interval_count 100
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    3.3445
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.45
_exptl_absorpt_correction_type   'ABSORB: F. Ugozzoli 1987'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.4464
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    not_measured
_exptl_crystal_description       prism
_exptl_crystal_F_000             712.0
_exptl_crystal_size_max          .57
_exptl_crystal_size_mid          .38
_exptl_crystal_size_min          .15
_refine_diff_density_max         1.024
_refine_diff_density_min         -0.489
_refine_diff_density_rms         0.100
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.035
_refine_ls_goodness_of_fit_obs   1.164
_refine_ls_hydrogen_treatment    not_refined
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         2749
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.140
_refine_ls_restrained_S_obs      1.164
_refine_ls_R_factor_all          0.1311
_refine_ls_R_factor_obs          0.0882
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.2251P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.3317
_refine_ls_wR_factor_obs         0.2502
_reflns_number_observed          1676
_reflns_number_total             3020
_reflns_threshold_expression     '>2 sigma(I)'
_cod_data_source_file            jo0267504si20021122_042738_4.cif
_cod_data_source_block           dnredcl1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.2251P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.2251P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_original_formula_sum        'C21 H12 N1 S1 Cl1'
_cod_database_code               4022344