Gold-catalyzed tandem [3,3]-propargyl ester rearrangement leading to (E)-1H-inden-1-ones.
Wang, Li-Jing; Zhu, Hai-Tao; Wang, An-Qi; Qiu, Yi-Feng; Liu, Xue-Yuan; Liang, Yong-Min; The Journal of organic chemistry 79 (2014) 204–212; doi:10.1021/jo402396h

data_4029064
_publ_section_title
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 Gold-catalyzed tandem [3,3]-propargyl ester rearrangement leading to
 (E)-1H-inden-1-ones.
;
_journal_issue                   1
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              204
_journal_page_last               212
_journal_paper_doi               10.1021/jo402396h
_journal_volume                  79
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C20 H18 O2'
_chemical_formula_sum            'C20 H18 O2'
_chemical_formula_weight         290.34
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-11-27
_audit_creation_method
;
  Olex2 1.2
  (compiled Apr  9 2013 14:06:00, GUI svn.r4458)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.5429(6)
_cell_length_b                   8.4278(9)
_cell_length_c                   34.013(3)
_cell_measurement_temperature    293(2)
_cell_volume                     1588.9(3)
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0328
_diffrn_reflns_av_unetI/netI     0.0714
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -3
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -41
_diffrn_reflns_number            4333
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         26.02
_diffrn_reflns_theta_min         3.01
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.077
_exptl_crystal_density_diffrn    1.214
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             616
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.133
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1(3)
_refine_ls_extinction_coef       0.025(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   1.077
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         2949
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.1001
_refine_ls_R_factor_gt           0.0664
_refine_ls_shift/su_max          0.017
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0460P)^2^+0.4121P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1412
_refine_ls_wR_factor_ref         0.1653
_reflns_number_gt                1941
_reflns_number_total             2949
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            wanglj1126_3.cif
_cod_data_source_block           wanglj1126_3
_cod_database_code               4029064
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C9(H9)
2.b Secondary CH2 refined with riding coordinates:
 C18(H18A,H18B)
2.c Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C4(H4), C5(H5), C7(H7), C11(H11), C12(H12), C13(H13), C14(H14)
2.d Idealised Me refined as rotating group:
 C17(H17A,H17B,H17C), C20(H20A,H20B,H20C)
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