Substrate-Controlled Selective Proximal and Distal C-C Bond Cleavage via Lewis Acid Mediated O-Acylation of 2-(Arylmethylene)cyclopropylaldehyde: A Stereoselective Synthesis of Bifunctional Methylenecyclobutanes and 1,3-Conjugated Dienes
Xian Huang; Maozhong Miao; Journal of Organic Chemistry 73 (2008) 6884–6887; doi:10.1021/jo801021f

data_4023644
_publ_section_title
;
 Substrate-Controlled Selective Proximal and Distal C-C Bond
 Cleavage via Lewis Acid Mediated O-Acylation of
 2-(Arylmethylene)cyclopropylaldehyde: A Stereoselective Synthesis
 of Bifunctional Methylenecyclobutanes and 1,3-Conjugated Dienes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6884
_journal_page_last               6887
_journal_paper_doi               10.1021/jo801021f
_journal_volume                  73
_journal_year                    2008
_chemical_absolute_configuration ad
_chemical_formula_sum            'C18 H14 Br Cl O2'
_chemical_formula_weight         377.65
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.3290(8)
_cell_length_b                   13.1065(13)
_cell_length_c                   14.8142(15)
_cell_measurement_reflns_used    3386
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      46.200
_cell_measurement_theta_min      5.500
_cell_volume                     1617.2(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.1202
_diffrn_reflns_av_sigmaI/netI    0.0920
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9593
_diffrn_reflns_theta_full        26.99
_diffrn_reflns_theta_max         26.99
_diffrn_reflns_theta_min         2.07
_exptl_absorpt_coefficient_mu    2.711
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.55786
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.551
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.428
_exptl_crystal_size_mid          0.239
_exptl_crystal_size_min          0.203
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.495
_refine_diff_density_rms         0.076
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.018(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.867
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         3543
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.867
_refine_ls_R_factor_all          0.0537
_refine_ls_R_factor_gt           0.0353
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0107P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0702
_refine_ls_wR_factor_ref         0.0734
_reflns_number_gt                2525
_reflns_number_total             3543
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo801021f-file001.cif
_cod_data_source_block           cd27390
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
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_cod_database_code               4023644