Selective C-acylation of CH-active dicarbonyl compounds with ketenylidenetriphenylphosphorane: syntheses and structures of 3-phosphoranylideneacyltetronic acids, 3-phosphoranylideneacyl-4-oxocoumarins, and 4-phosphoranylideneacylpyrazol-5-ones
Schobert, Rainer; Siegfried, Sven; Nieuwenhuyzen, Mark; Milius, Wolfgang; Hampel, Frank; Journal of the Chemical Society, Perkin Transactions 1  (2000) 1723–; doi:10.1039/b001541p

data_7213285
_publ_section_title
;
 Selective C-acylation of CH-active dicarbonyl compounds with
 ketenylidenetriphenylphosphorane: syntheses and structures of
 3-phosphoranylideneacyltetronic acids,
 3-phosphoranylideneacyl-4-oxocoumarins, and
 4-phosphoranylideneacylpyrazol-5-ones
;
_journal_issue                   11
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 1'
_journal_page_first              1723
_journal_paper_doi               10.1039/b001541p
_journal_year                    2000
_chemical_formula_sum            'C31 H30 O4 P'
_chemical_formula_weight         497.52
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 103.679(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   25.351(3)
_cell_length_b                   12.9583(12)
_cell_length_c                   16.409(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      12.5
_cell_measurement_theta_min      5
_cell_volume                     5237.6(10)
_computing_cell_refinement       'XSCANS (Fait, 1993)'
_computing_data_collection       'XSCANS (Fait, 1993)'
_computing_data_reduction        'XSCANS (Fait, 1993)'
_computing_molecular_graphics    'SHELXTL-PC (Sheldrick, 1995)'
_computing_publication_material  'SHELXTL-PC (Sheldrick, 1995)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measurement_device       'Siemens P4'
_diffrn_measurement_method       '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  0.0392
_diffrn_reflns_av_sigmaI/netI    0.0947
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -30
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            4728
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        1%
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.140
_exptl_absorpt_correction_T_max  0.779
_exptl_absorpt_correction_T_min  0.762
_exptl_absorpt_correction_type   'Psi Scans'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       Block
_exptl_crystal_F_000             2104
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.237
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.029
_refine_ls_goodness_of_fit_obs   1.105
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     330
_refine_ls_number_reflns         4618
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_restrained_S_obs      1.105
_refine_ls_R_factor_all          0.1227
_refine_ls_R_factor_obs          0.0611
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0384P)^2^+6.7072P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1310
_refine_ls_wR_factor_obs         0.1073
_reflns_number_observed          2810
_reflns_number_total             4618
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b001541psup1.cif
_cod_data_source_block           sso3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'Not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0384P)^2^+6.7072P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0384P)^2^+6.7072P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        5237.7(10)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7213285