Development of a Concise Synthesis of (+)-Ingenol.
McKerrall, Steven J.; Jørgensen, Lars; Kuttruff, Christian A.; Ungeheuer, Felix; Baran, Phil S.; Journal of the American Chemical Society 136 (2014) 5799–; doi:10.1021/ja501881p

data_4121659
_publ_section_title
;
 Development of a Concise Synthesis of (+)-Ingenol.
;
_journal_issue                   15
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              5799
_journal_paper_doi               10.1021/ja501881p
_journal_volume                  136
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C20 H28 O4'
_chemical_formula_sum            'C20 H28 O4'
_chemical_formula_weight         332.42
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2013-05-15
_audit_creation_method
;
  Olex2 1.2-beta
  (compiled Apr 23 2013 17:59:47, GUI svn.r4466)
;
_cell_angle_alpha                90
_cell_angle_beta                 94.8290(10)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.81660(10)
_cell_length_b                   8.37570(10)
_cell_length_c                   15.2655(2)
_cell_measurement_reflns_used    4691
_cell_measurement_temperature    100
_cell_measurement_theta_max      68.588
_cell_measurement_theta_min      2.905
_cell_volume                     868.47(2)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_collection       'Bruker APEX2 v2011.4-0 (Bruker, 2011)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
SHELXL-2012, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution    'Bruker APEX2 v2011.4-0 (Bruker, 2011)'
_diffrn_ambient_temperature      100.0
_diffrn_detector                 'Bruker APEX CCD'
_diffrn_detector_area_resol_mean 8.0
_diffrn_detector_type            'CCD Area Detector'
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device       'Fixed Chi Three-Circle Diffractometer'
_diffrn_measurement_device_type  'Bruker D8 APEX'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'Multilayer Mirrors'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_radiation_xray_symbol    K-L~3~
_diffrn_reflns_av_R_equivalents  0.0300
_diffrn_reflns_av_unetI/netI     0.0295
_diffrn_reflns_Laue_measured_fraction_full 0.970
_diffrn_reflns_Laue_measured_fraction_max 0.959
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            8649
_diffrn_reflns_point_group_measured_fraction_full 0.911
_diffrn_reflns_point_group_measured_fraction_max 0.897
_diffrn_reflns_theta_full        68.000
_diffrn_reflns_theta_max         68.885
_diffrn_reflns_theta_min         2.905
_diffrn_source                   'Micro Focus Rotating Anode'
_diffrn_source_type              'Bruker FR-591'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.698
_exptl_absorpt_correction_T_max  0.7531
_exptl_absorpt_correction_T_min  0.6555
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.0783 before and 0.0437 after correction.
The Ratio of minimum to maximum transmission is 0.8704.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            Colorless
_exptl_crystal_colour_primary    Colorless
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_description       Prism
_exptl_crystal_F_000             360
_exptl_crystal_size_max          0.331
_exptl_crystal_size_mid          0.273
_exptl_crystal_size_min          0.261
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details
;
 Flack x determined using 1196 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.02(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     234
_refine_ls_number_reflns         2883
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0293
_refine_ls_R_factor_gt           0.0288
_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^)+(0.0428P)^2^+0.1335P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0743
_refine_ls_wR_factor_ref         0.0749
_reflns_Friedel_coverage         0.742
_reflns_Friedel_fraction_full    0.841
_reflns_Friedel_fraction_max     0.826
_reflns_number_gt                2843
_reflns_number_total             2883
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja501881p_si_009.cif
_cod_data_source_block           baran288
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to
/usr/data/users/saulius/crontab/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 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 4121658--4121664.cif.
;
_cod_database_code               4121659
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 O2-H2 = O3-H3 = O4-H4
 0.9 with sigma of 0.02
3.a Ternary CH refined with riding coordinates:
 C3(H3A), C4(H4A), C6(H6), C9(H9), C12(H12), C14(H14)
3.b Secondary CH2 refined with riding coordinates:
 C5(H5A,H5B)
3.c Aromatic/amide H refined with riding coordinates:
 C10(H10), C16(H16)
3.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C), C19(H19A,H19B,
 H19C), C20(H20A,H20B,H20C)
;
_shelx_estimated_absorpt_t_max   0.839
_shelx_estimated_absorpt_t_min   0.802
_shelx_hkl_checksum              39668
_shelx_res_checksum              23885
_shelxl_version_number           2013-3