Base-mediated reaction of the Bestmann-Ohira reagent with nitroalkenes for the regioselective synthesis of phosphonylpyrazoles.
Muruganantham, R.; Mobin, Shaikh M.; Namboothiri, Irishi N. N.; Organic letters 9 (2007) 1125–1128; doi:10.1021/ol070107s

data_1505332
_publ_section_title
;
 Base-mediated reaction of the Bestmann-Ohira reagent with nitroalkenes
 for the regioselective synthesis of phosphonylpyrazoles.
;
_journal_issue                   6
_journal_name_full               'Organic letters'
_journal_page_first              1125
_journal_page_last               1128
_journal_paper_doi               10.1021/ol070107s
_journal_volume                  9
_journal_year                    2007
_chemical_formula_sum            'C14 H17 N2 O5 P'
_chemical_formula_weight         324.27
_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                 113.411(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.2560(11)
_cell_length_b                   8.1070(9)
_cell_length_c                   15.4750(15)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12.0200
_cell_measurement_theta_min      5.6800
_cell_volume                     1526.1(3)
_computing_cell_refinement       'Argus (Nonius, MACH3 software)'
_computing_data_collection       'Argus (Nonius, MACH3 software)'
_computing_data_reduction        'Maxus (Nonius software)'
_computing_molecular_graphics    Ortep
_computing_publication_material  Shelx97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.927
_diffrn_measured_fraction_theta_max 0.927
_diffrn_measurement_device_type  'Nonius MACH3'
_diffrn_measurement_method       \w/q-scan
_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  0.0875
_diffrn_reflns_av_sigmaI/netI    0.1255
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            2802
_diffrn_reflns_theta_full        24.92
_diffrn_reflns_theta_max         24.92
_diffrn_reflns_theta_min         1.67
_diffrn_standards_decay_%        <3%
_diffrn_standards_interval_time  3600
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.205
_exptl_absorpt_correction_T_max  0.9699
_exptl_absorpt_correction_T_min  0.9410
_exptl_absorpt_correction_type   psi-scan
_exptl_crystal_colour            pale-yellow
_exptl_crystal_density_diffrn    1.411
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.427
_refine_diff_density_min         -0.331
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     205
_refine_ls_number_reflns         2680
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.1773
_refine_ls_R_factor_gt           0.0664
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0866P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1516
_refine_ls_wR_factor_ref         0.1879
_reflns_number_gt                1373
_reflns_number_total             2680
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol070107ssi20070204_101550.cif
_cod_data_source_block           iin23a
_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 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Psi-scan'
changed to 'psi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0866P)^2^+0.0000P] 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^)+(0.0866P)^2^+0.0000P] 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      'P 21/c'
_cod_database_code               1505332