Apical Functionalization of Chiral Heterohelicenes
Sravan K. Surampudi; G. Nagarjuna; Daiki Okamoto; Piyali D. Chaudhuri; D. Venkataraman; Journal of Organic Chemistry 77 (2012) 2074–2079; doi:10.1021/jo202623u

data_4026995
_publ_contact_author_address
;
Department of Chemistry
University of Massachusetts Amherst
710 N. Pleasant Street
Amherst, MA 01003
;
_publ_contact_author_email       dv@chem.umass.edu
_publ_contact_author_fax         413-545-4490
_publ_contact_author_name        'Dhandapani Venkataraman'
_publ_contact_author_phone       413-545-2028
_publ_section_title
;
 Apical Functionalization of Chiral Heterohelicenes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2074
_journal_page_last               2079
_journal_paper_doi               10.1021/jo202623u
_journal_volume                  77
_journal_year                    2012
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C21 H16 Br1 O5'
_chemical_formula_sum            'C21 H16 Br N O5'
_chemical_formula_weight         442.26
_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/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2011-12-16T16:48:22-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                85.7770(10)
_cell_angle_beta                 82.9200(10)
_cell_angle_gamma                82.2350(10)
_cell_formula_units_Z            2
_cell_length_a                   8.7822(2)
_cell_length_b                   10.8031(2)
_cell_length_c                   10.9890(2)
_cell_measurement_reflns_used    3442
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.028
_cell_measurement_theta_min      4.076
_cell_measurement_wavelength     0.71073
_cell_volume                     1023.42(4)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_orient_matrix_type       'by Bruker AXS Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      0.349729E-1
_diffrn_orient_matrix_UB_12      0.521983E-1
_diffrn_orient_matrix_UB_13      -0.74538E-1
_diffrn_orient_matrix_UB_21      -0.575525E-1
_diffrn_orient_matrix_UB_22      0.766062E-1
_diffrn_orient_matrix_UB_23      0.379364E-1
_diffrn_orient_matrix_UB_31      0.940599E-1
_diffrn_orient_matrix_UB_32      0.128079E-1
_diffrn_orient_matrix_UB_33      0.379737E-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  0.0149
_diffrn_reflns_av_unetI/netI     0.0248
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6341
_diffrn_reflns_reduction_process
;
 Scaled and merged with Sortav
 R.H. Blessing, (1987) Cryst. Rev. 1, 3-58
 R.H. Blessing, (1989) J. Appl. Cryst. 22, 396-397
;
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         4.1
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    2.039
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.435
_exptl_crystal_description       prism
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.385
_refine_diff_density_min         -0.616
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         3607
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0551
_refine_ls_R_factor_gt           0.0439
_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^)+(0.0576P)^2^+0.5247P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1135
_refine_ls_wR_factor_ref         0.1218
_reflns_number_gt                2900
_reflns_number_total             3607
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo202623u_si_003_3.cif
_cod_data_source_block           compound8
_cod_original_sg_symbol_Hall     'P -1'
_cod_database_code               4026995