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_7213286
_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            'C29 H21 O4 P'
_chemical_formula_weight         464.43
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 95.56(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.938(2)
_cell_length_b                   22.265(5)
_cell_length_c                   11.629(2)
_cell_measurement_reflns_used    15
_cell_measurement_temperature    173(2)
_cell_volume                     2303.3(8)
_computing_cell_refinement       Express
_computing_data_collection       Express
_computing_data_reduction        MoleN
_computing_publication_material  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measurement_device       'Nonius Mach3 '
_diffrn_measurement_method       'theta scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0697
_diffrn_reflns_av_sigmaI/netI    0.0558
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            4312
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         2.47
_diffrn_standards_decay_%        3
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  7200
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.154
_exptl_absorpt_correction_T_max  11.0
_exptl_absorpt_correction_T_min  2.7
_exptl_absorpt_correction_type   'psi scans'
_exptl_crystal_density_diffrn    1.339
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.366
_refine_diff_density_min         -0.341
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.053
_refine_ls_goodness_of_fit_obs   1.084
_refine_ls_hydrogen_treatment    'riding model'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     379
_refine_ls_number_reflns         4043
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_restrained_S_obs      1.084
_refine_ls_R_factor_all          0.0857
_refine_ls_R_factor_obs          0.0469
_refine_ls_shift/esd_max         0.001
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0622P)^2^+0.8898P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1303
_refine_ls_wR_factor_obs         0.1086
_reflns_number_observed          2776
_reflns_number_total             4043
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b001541psup1.cif
_cod_data_source_block           ss01
_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:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0622P)^2^+0.8898P] 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^)+(0.0622P)^2^+0.8898P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7213286