Synthetic ansamycins prepared by a ring-expanding Claisen rearrangement. Synthesis and biological evaluation of ring and conformational analogues of the Hsp90 molecular chaperone inhibitor geldanamycin.
McErlean, Christopher S. P.; Proisy, Nicolas; Davis, Christopher J.; Boland, Nicola A.; Sharp, Swee Y.; Boxall, Kathy; Slawin, Alexandra M. Z.; Workman, Paul; Moody, Christopher J.; Organic & biomolecular chemistry 5 (2007) 531–546; doi:10.1039/b615378j

data_7151051
_publ_section_title
;
 Synthetic ansamycins prepared by a ring-expanding Claisen
 rearrangement. Synthesis and biological evaluation of ring and
 conformational analogues of the Hsp90 molecular chaperone inhibitor
 geldanamycin.
;
_journal_issue                   3
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              531
_journal_page_last               546
_journal_paper_doi               10.1039/b615378j
_journal_volume                  5
_journal_year                    2007
_chemical_formula_moiety         'C24 H33 N O4'
_chemical_formula_sum            'C24 H33 N O4'
_chemical_formula_weight         399.51
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_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_creation_method           SHELXL-97
_cell_angle_alpha                81.631(2)
_cell_angle_beta                 81.670(2)
_cell_angle_gamma                78.225(2)
_cell_formula_units_Z            2
_cell_length_a                   8.8832(12)
_cell_length_b                   10.3813(15)
_cell_length_c                   12.0879(17)
_cell_measurement_reflns_used    225
_cell_measurement_temperature    125(2)
_cell_measurement_theta_max      28
_cell_measurement_theta_min      12
_cell_volume                     1072.0(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      125(2)
_diffrn_detector_area_resol_mean 0.83
_diffrn_measured_fraction_theta_full 0.961
_diffrn_measured_fraction_theta_max 0.961
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0133
_diffrn_reflns_av_sigmaI/netI    0.0245
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            6794
_diffrn_reflns_theta_full        25.45
_diffrn_reflns_theta_max         25.45
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.961598
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.238
_exptl_crystal_description       prism
_exptl_crystal_F_000             432
_exptl_crystal_size_max          .1
_exptl_crystal_size_mid          .1
_exptl_crystal_size_min          .1
_refine_diff_density_max         1.515
_refine_diff_density_min         -0.603
_refine_diff_density_rms         0.063
_refine_ls_extinction_coef       0.008(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     278
_refine_ls_number_reflns         3816
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0834
_refine_ls_R_factor_gt           0.0681
_refine_ls_shift/su_max          0.075
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0846P)^2^+1.6301P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1683
_refine_ls_wR_factor_ref         0.1813
_reflns_number_gt                3131
_reflns_number_total             3816
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b615378j.txt
_cod_data_source_block           compound_26a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7151051