Regio- and Stereocontrolled Selective Debenzylation and Substitution Reactions of C-2 Formyl Glycals. Application in the Synthesis of Constrained β-Sugar Amino Acids
Girish K. Rawal; Shikha Rani; Nitee Kumari; Yashwant D. Vankar; Journal of Organic Chemistry 74 (2009) 5349–5355; doi:10.1021/jo9008222

data_4024694
_publ_section_title
;
Regio- and Stereocontrolled Selective Debenzylation and Substitution
Reactions of C-2 Formyl Glycals. Application in the Synthesis of
Constrained \b-Sugar Amino Acids
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5349
_journal_page_last               5355
_journal_paper_doi               10.1021/jo9008222
_journal_volume                  74
_journal_year                    2009
_chemical_formula_sum            'C22 H29 N O8'
_chemical_formula_weight         435.46
_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                 118.994(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.534(2)
_cell_length_b                   9.6312(18)
_cell_length_c                   11.875(2)
_cell_measurement_reflns_used    1000
_cell_measurement_temperature    293(2)
_cell_volume                     1153.8(4)
_computing_cell_refinement       'SMART 5.628 (Bruker, 2003)'
_computing_data_collection       'SMART 5.628 (Bruker, 2003)'
_computing_data_reduction        'SAINT+ 6.45  (Bruker, 2003)'
_computing_molecular_graphics    'DIAMOND 2.1 e'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    Sir92
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0247
_diffrn_reflns_av_sigmaI/netI    0.0605
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            7537
_diffrn_reflns_theta_full        28.35
_diffrn_reflns_theta_max         28.35
_diffrn_reflns_theta_min         2.02
_exptl_absorpt_coefficient_mu    0.095
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.8(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     285
_refine_ls_number_reflns         5310
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0690
_refine_ls_R_factor_gt           0.0555
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0532P)^2^+0.1697P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1131
_refine_ls_wR_factor_ref         0.1183
_reflns_number_gt                4460
_reflns_number_total             5310
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo9008222_si_004.cif
_cod_data_source_block           27maybm
_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.

'_refine_ls_hydrogen_treatment' value 'Constr' changed to
'constr' 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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P21
_cod_database_code               4024694