Synthesis of 4-Aryl- and 4-Alkyl-2-silyl-1,3-butadienes and Their Diels-Alder/Cross-Coupling Reactions
Christopher S. Junker; Mark E. Welker; Cynthia S. Day; Journal of Organic Chemistry 75 (2010) 8155–8165; doi:10.1021/jo1017734

data_4025851
_publ_contact_author_address
; 
Department of Chemistry 
Wake Forest University
P. O. Box 7486
Winston-Salem, N.C. 27109
U.S.A.
;
_publ_contact_author_email       welker@wfu.edu
_publ_contact_author_fax         '336 758 4656'
_publ_contact_author_name        'Mark E. Welker'
_publ_contact_author_phone       '336 758 5758'
_publ_section_title
;
 Synthesis of 4-Aryl- and 4-Alkyl-2-silyl-1,3-butadienes and Their
 Diels-Alder/Cross-Coupling Reactions
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8155
_journal_page_last               8165
_journal_paper_doi               10.1021/jo1017734
_journal_volume                  75
_journal_year                    2010
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C26 H31 N O2 Si'
_chemical_formula_sum            'C26 H31 N O2 Si'
_chemical_formula_weight         417.61
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXTL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.1254(11)
_cell_length_b                   13.4757(18)
_cell_length_c                   21.652(3)
_cell_measurement_reflns_used    3975
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      22.31
_cell_measurement_theta_min      3.76
_cell_volume                     2370.8(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0533
_diffrn_reflns_av_sigmaI/netI    0.0332
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            21111
_diffrn_reflns_theta_full        26.72
_diffrn_reflns_theta_max         26.72
_diffrn_reflns_theta_min         3.76
_exptl_absorpt_coefficient_mu    0.120
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6129
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 Data were corrected for scaling and absorption effects
 using the  multi-scan technique (SADABS) Sheldrick, G. M. (2008).  
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.170
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallelepiped
_exptl_crystal_F_000             896
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.315
_refine_diff_density_min         -0.139
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     312
_refine_ls_number_reflns         2857
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0584
_refine_ls_R_factor_gt           0.0471
_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^)+(0.0730P)^2^+0.2096P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1131
_refine_ls_wR_factor_ref         0.1217
_reflns_number_gt                2402
_reflns_number_total             2857
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo1017734_si_002_1.cif
_cod_data_source_block           a02q2m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to the built-in table from CIF Core
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
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_cod_database_code               4025851