Wittig olefination between phosphine, aldehyde, and allylic carbonate: a general method for stereoselective synthesis of trisubstituted 1,3-dienes with highly variable substituents.
Zhou, Rong; Wang, Chunzhang; Song, Haibin; He, Zhengjie; Organic letters 12 (2010) 976–979; doi:10.1021/ol902956y

data_1503432
_publ_section_title
;
 Wittig olefination between phosphine, aldehyde, and allylic carbonate: a
 general method for stereoselective synthesis of trisubstituted 1,3-dienes
 with highly variable substituents.
;
_journal_issue                   5
_journal_name_full               'Organic letters'
_journal_page_first              976
_journal_page_last               979
_journal_paper_doi               10.1021/ol902956y
_journal_volume                  12
_journal_year                    2010
_chemical_formula_sum            'C20 H20 O4'
_chemical_formula_weight         324.36
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 91.42(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.257(3)
_cell_length_b                   7.3998(15)
_cell_length_c                   15.245(3)
_cell_measurement_reflns_used    3590
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      27.928
_cell_measurement_theta_min      2.671
_cell_volume                     1720.6(6)
_computing_cell_refinement       crystalclear
_computing_data_collection       crystalclear
_computing_data_reduction        crystalclear
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      113(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'rigaku saturn'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1603
_diffrn_reflns_av_sigmaI/netI    0.1622
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_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            12327
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.67
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9914
_exptl_absorpt_correction_T_min  0.9829
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   crystalclear
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             688
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.191
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         3024
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.885
_refine_ls_R_factor_all          0.0789
_refine_ls_R_factor_gt           0.0500
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0187P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0855
_refine_ls_wR_factor_ref         0.0909
_reflns_number_gt                1750
_reflns_number_total             3024
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol902956y_si_002.cif
_cod_data_source_block           r81210d1
_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 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from
2011-04-26.

'_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1720.7(6)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1503432