Gold(i) catalysed sequential dehydrative cyclisation/intermolecular [4 + 2] cycloaddition of alkynyldienols onto activated alkynes/alkenes: a facile route to substituted norbornadienes/norbornenes.
Uruvakili, Anasuyamma; Gangadhararao, G.; Kumara Swamy, K. C.; Organic & biomolecular chemistry 13 (2015) 10060–10071; doi:10.1039/c5ob01458a

data_7154659
_publ_section_title
;
 Gold(i) catalysed sequential dehydrative cyclisation/intermolecular [4 +
 2] cycloaddition of alkynyldienols onto activated alkynes/alkenes: a
 facile route to substituted norbornadienes/norbornenes.
;
_journal_issue                   39
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              10060
_journal_page_last               10071
_journal_paper_doi               10.1039/c5ob01458a
_journal_volume                  13
_journal_year                    2015
_chemical_formula_sum            'C25 H20 O'
_chemical_formula_weight         336.41
_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
_audit_update_record
;
2015-04-25 deposited with the CCDC.
2015-08-21 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 99.008(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   20.9391(5)
_cell_length_b                   19.6321(4)
_cell_length_c                   19.0212(5)
_cell_measurement_temperature    293(2)
_cell_volume                     7722.8(3)
_computing_cell_refinement       'CrysAlisPro, Oxford Diffraction Ltd.'
_computing_data_collection       'CrysAlisPro, Oxford Diffraction Ltd.'
_computing_data_reduction        'CrysAlisPro, Oxford Diffraction Ltd.'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_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           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0263
_diffrn_reflns_av_sigmaI/netI    0.0270
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            39574
_diffrn_reflns_theta_full        71.74
_diffrn_reflns_theta_max         71.74
_diffrn_reflns_theta_min         3.10
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count 'not applicable'
_diffrn_standards_interval_time  'not applicable'
_diffrn_standards_number         'not applicable'
_exptl_absorpt_coefficient_mu    0.531
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.91023
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro, Oxford Diffraction Ltd.'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.157
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             2848
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.326
_refine_diff_density_min         -0.293
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     945
_refine_ls_number_reflns         14836
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0778
_refine_ls_R_factor_gt           0.0555
_refine_ls_shift/su_max          0.013
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0699P)^2^+1.9019P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1470
_refine_ls_wR_factor_ref         0.1639
_reflns_number_gt                10576
_reflns_number_total             14836
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ob01458a2.cif
_cod_data_source_block           Compd5aa
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 7154658--7154662.cif.
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7154659