Asymmetric syntheses of (-)-3-epi-Fagomine, (2R,3S,4R)-dihydroxypipecolic acid, and several polyhydroxylated homopipecolic acids.
Csatayová, Kristína; Davies, Stephen G.; Fletcher, Ai M.; Ford, J. Gair; Klauber, David J.; Roberts, Paul M.; Thomson, James E.; The Journal of organic chemistry 79 (2014) 10932–10944; doi:10.1021/jo501952t

data_4030116
_publ_section_title
;
 Asymmetric syntheses of (-)-3-epi-Fagomine, (2R,3S,4R)-dihydroxypipecolic
 acid, and several polyhydroxylated homopipecolic acids.
;
_journal_issue                   22
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              10932
_journal_page_last               10944
_journal_paper_doi               10.1021/jo501952t
_journal_volume                  79
_journal_year                    2014
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C19 H29 N1 O4'
_chemical_formula_sum            'C19 H29 N O4'
_chemical_formula_weight         335.44
_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   difmap
_atom_sites_solution_primary     direct
_cell_angle_alpha                90
_cell_angle_beta                 105.0744(15)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   10.6486(4)
_cell_length_b                   8.3141(3)
_cell_length_c                   11.0574(5)
_cell_measurement_reflns_used    2211
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     945.26(7)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.026
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            3795
_diffrn_reflns_theta_full        26.101
_diffrn_reflns_theta_max         27.474
_diffrn_reflns_theta_min         5.263
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.99
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.178
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             364
_exptl_crystal_size_max          0.250
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.140
_refine_diff_density_max         0.20
_refine_diff_density_min         -0.20
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9781
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         1870
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0402
_refine_ls_R_factor_gt           0.0325
_refine_ls_shift/su_max          0.0001917
_refine_ls_shift/su_mean         0.0000220
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.04P)^2^ + 0.13P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0746
_refine_ls_wR_factor_gt          0.0715
_refine_ls_wR_factor_ref         0.0746
_reflns_limit_h_max              13
_reflns_limit_h_min              -13
_reflns_limit_k_max              10
_reflns_limit_k_min              0
_reflns_limit_l_max              14
_reflns_limit_l_min              0
_reflns_number_gt                1642
_reflns_number_total             2294
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.56
_oxford_diffrn_Wilson_scale      1.43
_oxford_refine_ls_r_factor_ref   0.0402
_oxford_refine_ls_scale          0.822(3)
_oxford_reflns_number_all        1870
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_cod_data_source_file            jo501952t_si_001.cif
_cod_data_source_block           37
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/home/saulius/struct/COD-crude-data--automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_atom_sites_solution_primary' value 'Direct' changed to
'direct' according to
/home/saulius/struct/COD-crude-data--automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2827 2014-09-09 07:05:25Z andrius 

 Adding full bibliography for 4030114--4030119.cif.
;
_cod_original_formula_sum        'C19 H29 N1 O4'
_cod_database_code               4030116
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
RIDE C   (   4,X'S) H   (  41,X'S) H   (  42,X'S) 
RIDE C   (   5,X'S) H   (  51,X'S) 
RIDE C   (   7,X'S) H   (  71,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  10,X'S) H   ( 101,X'S) 
RIDE C   (  11,X'S) H   ( 111,X'S) 
RIDE C   (  12,X'S) H   ( 121,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) 
RIDE C   (  14,X'S) H   ( 142,X'S) H   ( 141,X'S) H   ( 143,X'S) 
RIDE C   (  15,X'S) H   ( 152,X'S) H   ( 151,X'S) 
RIDE C   (  16,X'S) H   ( 161,X'S) H   ( 162,X'S) 
RIDE C   (  17,X'S) H   ( 171,X'S) 
RIDE C   (  18,X'S) H   ( 181,X'S) 
RIDE O   (  19,X'S) H   ( 191,X'S) 
RIDE O   (  20,X'S) H   ( 201,X'S) 
RIDE C   (  22,X'S) H   ( 222,X'S) H   ( 221,X'S) H   ( 223,X'S) 
RIDE C   (  23,X'S) H   ( 233,X'S) H   ( 232,X'S) H   ( 231,X'S) 
RIDE C   (  24,X'S) H   ( 243,X'S) H   ( 242,X'S) H   ( 241,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;