2-O-Alkylated para-benzamide α-helix mimetics: the role of scaffold curvature.
Azzarito, Valeria; Prabhakaran, Panchami; Bartlett, Alice I.; Murphy, Natasha S.; Hardie, Michaele J.; Kilner, Colin A.; Edwards, Thomas A.; Warriner, Stuart L.; Wilson, Andrew J.; Organic & biomolecular chemistry 10 (2012) 6469–6472; doi:10.1039/c2ob26262b

data_7152545
_publ_section_title
;
 2-O-Alkylated para-benzamide \a-helix mimetics: the role of scaffold
 curvature.
;
_journal_issue                   32
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              6469
_journal_page_last               6472
_journal_paper_doi               10.1039/c2ob26262b
_journal_volume                  10
_journal_year                    2012
_chemical_formula_moiety         'C21 H26 N2 O5'
_chemical_formula_sum            'C21 H26 N2 O5'
_chemical_formula_weight         386.44
_chemical_name_common            Benzamide
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.421(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0441(7)
_cell_length_b                   13.9383(10)
_cell_length_c                   17.5956(12)
_cell_measurement_reflns_used    8184
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.58
_cell_measurement_theta_min      2.28
_cell_volume                     2188.2(3)
_computing_cell_refinement
;
APEX 2 software, Bruker Nonius 2004
;
_computing_data_collection
;
APEX 2 software, Bruker Nonius 2004
;
_computing_data_reduction
;
SAINT - Bruker Integration program embedded in
APEX 2 software, Bruker Nonius 2004
;
_computing_molecular_graphics    'ORTEP-III Version 1.08 (Farrugia, 2005)'
_computing_publication_material
;
enCIFer: A program for viewing, editing and visualising CIFs.
F. H. Allen, O. Johnson, G. P. Shields, B. R. Smith, M. Towler,
J. Applied Cryst., 37, 331-334, 2004
;
_computing_structure_refinement
;
SHELXL-97 (Sheldrick, G. M. Acta Cryst. (2008). A64, 112)
XSeed (L.J.Barbour, J.Supramol. Chem., 2003, 1, 189.)
;
_computing_structure_solution
;
SHELXS-97 (Sheldrick, G. M. Acta Cryst. (2008). A64, 112)
XSeed (L.J.Barbour, J.Supramol. Chem., 2003, 1, 189.)
;
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean
;
120 microns
;
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type
;
Mach3 kappa-type 4-circle goniostat.
;
_diffrn_measurement_method       'rotation images'
_diffrn_radiation_detector       'ApexII camera'
_diffrn_radiation_monochromator
;
graphite model mounted in "parallel" mode
;
_diffrn_radiation_source
;
Bruker Nonius FR591 rotating anode generator
;
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0636
_diffrn_reflns_av_sigmaI/netI    0.0454
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            53179
_diffrn_reflns_theta_full        28.55
_diffrn_reflns_theta_max         28.55
_diffrn_reflns_theta_min         1.87
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  0.9950
_exptl_absorpt_correction_T_min  0.7544
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
See Sheldrick, G. M. (2002). SADABS.
University of Gottingen, Germany.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.173
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             824
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.696
_refine_diff_density_min         -0.292
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     270
_refine_ls_number_reflns         5489
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.1298
_refine_ls_R_factor_gt           0.0743
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1026P)^2^+1.7358P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2001
_refine_ls_wR_factor_ref         0.2362
_reflns_number_gt                3170
_reflns_number_total             5489
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26262b.txt
_cod_data_source_block           C21H26N2O5compound4
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7152545