Total Synthesis of Englerin A
K. C. Nicolaou; Qiang Kang; Sin Yee Ng; David Y.-K. Chen; Journal of the American Chemical Society 132 (2010) 8219–8222; doi:10.1021/ja102927n

data_4102534
_publ_section_title
;
 Total Synthesis of Englerin A
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8219
_journal_page_last               8222
_journal_paper_doi               10.1021/ja102927n
_journal_volume                  132
_journal_year                    2010
_chemical_formula_moiety         'C17 H28 O3'
_chemical_formula_sum            'C17 H28 O3'
_chemical_formula_weight         280.39
_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                 91.27(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.6908(19)
_cell_length_b                   9.4900(19)
_cell_length_c                   16.734(3)
_cell_measurement_reflns_used    3654
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      30.8969
_cell_measurement_theta_min      2.1020
_cell_volume                     1538.6(5)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'CCD area deterctor'
_diffrn_measurement_method       '\w 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  0.0363
_diffrn_reflns_av_sigmaI/netI    0.0388
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            11892
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.43
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9825
_exptl_absorpt_correction_T_min  0.9825
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'R. H. Blessing, Acta Cryst. 1995 A51, 33-38'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.210
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             616
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.259
_refine_diff_density_min         -0.244
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.147
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     187
_refine_ls_number_reflns         3786
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.147
_refine_ls_R_factor_all          0.0778
_refine_ls_R_factor_gt           0.0662
_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^)+(0.0723P)^2^+0.5934P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1571
_refine_ls_wR_factor_ref         0.1692
_reflns_number_gt                3292
_reflns_number_total             3786
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja102927n_si_002.cif
_cod_data_source_block           shelxs
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4102534