Phosphinamide-directed benzylic lithiation. Application to the synthesis of peptide building blocks.
Burgos, Pascual Oña; Fernández, Ignacio; Iglesias, María José; García-Granda, Santiago; Ortiz, Fernando López; Organic letters 10 (2008) 537–540; doi:10.1021/ol7028096

data_1504510
_publ_section_title
;
 Phosphinamide-directed benzylic lithiation. Application to the synthesis
 of peptide building blocks.
;
_journal_issue                   4
_journal_name_full               'Organic letters'
_journal_page_first              537
_journal_page_last               540
_journal_paper_doi               10.1021/ol7028096
_journal_volume                  10
_journal_year                    2008
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C32 H36 N O2 P'
_chemical_formula_sum            'C32 H36 N O2 P'
_chemical_formula_weight         497.59
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 104.9002(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.6667(1)
_cell_length_b                   8.2209(1)
_cell_length_c                   18.7079(1)
_cell_measurement_reflns_used    15841
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      69.9319
_cell_measurement_theta_min      2.9775
_cell_volume                     2774.33(4)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.8 (release 12-01-2007 CrysAlis171 .NET)
(compiled Jan 12 2007,17:49:11)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.31.8 (release 12-01-2007 CrysAlis171 .NET)
(compiled Jan 12 2007,17:49:11)
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.8 (release 12-01-2007 CrysAlis171 .NET)
(compiled Jan 12 2007,17:49:11)
;
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
;
Patterson methods using DIRDIF-99 (Beurskens et al., 1999)
;
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8.2640
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.961
_diffrn_measurement_device_type  CCD
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.0232
_diffrn_reflns_av_sigmaI/netI    0.0264
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            20822
_diffrn_reflns_theta_full        70.00
_diffrn_reflns_theta_max         70.09
_diffrn_reflns_theta_min         2.98
_exptl_absorpt_coefficient_mu    1.090
_exptl_absorpt_correction_T_max  0.947
_exptl_absorpt_correction_T_min  0.937
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.31.8 (release 12-01-2007 CrysAlis171 .NET)
(compiled Jan 12 2007,17:49:11)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.191
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prismatic
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.241
_refine_diff_density_min         -0.243
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.000(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     650
_refine_ls_number_reflns         20809
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0355
_refine_ls_R_factor_gt           0.0309
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0558P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0780
_refine_ls_wR_factor_ref         0.0836
_reflns_number_gt                18652
_reflns_number_total             20809
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7028096-file005.cif
_cod_data_source_block           15
_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.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P21
_cod_database_code               1504510