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_4030119
_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 ad
_chemical_formula_sum            'C15 H19 N O4'
_chemical_formula_weight         272.9
_space_group_IT_number           146
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'R 3'
_symmetry_space_group_name_H-M   'R 3 :H'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     other
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            9
_cell_length_a                   25.9883(7)
_cell_length_b                   25.9883(7)
_cell_length_c                   5.81758(17)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    150
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
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_computing_cell_refinement       'CrysAlis, (Oxford Diffraction, 2002)'
_computing_data_collection       'SuperNova, (Oxford Diffraction, 2010)'
_computing_data_reduction        'CrysAlis, (Oxford Diffraction, 2002)'
_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    'Superflip (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Oxford Diffraction SuperNova'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
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_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
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_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
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_refine_ls_abs_structure_details 'Flack (1983), 1649 Friedel-pairs'
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_refine_ls_extinction_method     None
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     182
_refine_ls_number_reflns         2688
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_refine_ls_shift/su_max          0.0007743
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_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 58.1 -15.9 72.0 -8.86 18.1 
;
_refine_ls_weighting_scheme      calc
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_reflns_limit_k_min              0
_reflns_limit_l_max              7
_reflns_limit_l_min              -7
_reflns_number_gt                2832
_reflns_number_total             3085
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.89
_oxford_diffrn_Wilson_scale      0.07
_oxford_refine_ls_r_factor_ref   0.0864
_oxford_refine_ls_scale          3.893(19)
_oxford_reflns_number_all        3085
_oxford_reflns_threshold_expression_ref I>3.0\s(I)
_cod_data_source_file            jo501952t_si_001.cif
_cod_data_source_block           47
_cod_depositor_comments
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The following automatic conversions were performed:

'_atom_sites_solution_primary' value 'Other' changed to 'other'
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_cell_volume        3402.73(17)
_cod_original_sg_symbol_H-M      'R 3'
_cod_original_formula_sum        'C13.50 H17.10 N0.90 O3.60'
_cod_database_code               4030119
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
CONT ENANTIO 
RIDE O   (   1,X'S) H   (  11,X'S) 
RIDE C   (   2,X'S) H   (  21,X'S) 
RIDE C   (   3,X'S) H   (  31,X'S) 
RIDE C   (   5,X'S) H   (  51,X'S) 
RIDE C   (   7,X'S) H   (  71,X'S) 
RIDE C   (   8,X'S) H   (  81,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) H   ( 122,X'S) H   ( 123,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) H   ( 132,X'S) 
RIDE C   (  14,X'S) H   ( 141,X'S) H   ( 142,X'S) 
RIDE C   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  16,X'S) H   ( 161,X'S) 
RIDE O   (  20,X'S) H   ( 201,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                                                                             
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