A Simple and Mild Synthesis of 1H-Isochromenes and (Z)-1-Alkylidene-1,3-dihydroisobenzofurans by the Iodocyclization of 2-(1-Alkynyl)benzylic Alcohols
Raffaella Mancuso; Saurabh Mehta; Bartolo Gabriele; Giuseppe Salerno; William S. Jenks; Richard C. Larock; Journal of Organic Chemistry 75 (2010) 897–901; doi:10.1021/jo902333y

data_4025198
_publ_contact_author_address
'Department of Chemistry, Iowa State University, Ames, Iowa 50011 USA'
_publ_contact_author_name        'Richard C. Larock'
_publ_section_title
;
 A Simple and Mild Synthesis of 1H-Isochromenes and
 (Z)-1-Alkylidene-1,3-dihydroisobenzofurans by the Iodocyclization of
 2-(1-Alkynyl)benzylic Alcohols
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              897
_journal_page_last               901
_journal_paper_doi               10.1021/jo902333y
_journal_volume                  75
_journal_year                    2010
_chemical_formula_sum            'C19 H19 I O'
_chemical_formula_weight         390.24
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 108.350(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.2638(19)
_cell_length_b                   10.3724(18)
_cell_length_c                   15.229(3)
_cell_measurement_reflns_used    8134
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      52.95
_cell_measurement_theta_min      5.41
_cell_volume                     1688.8(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SAINT'
_computing_data_reduction        'Bruker SAINT'
_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      295(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0322
_diffrn_reflns_av_sigmaI/netI    0.0131
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            26961
_diffrn_reflns_theta_full        26.50
_diffrn_reflns_theta_max         26.50
_diffrn_reflns_theta_min         1.98
_exptl_absorpt_coefficient_mu    1.893
_exptl_absorpt_correction_T_max  0.745
_exptl_absorpt_correction_T_min  0.654
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.535
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       irregular
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         1.178
_refine_diff_density_min         -0.880
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         3481
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0271
_refine_ls_R_factor_gt           0.0246
_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^)+(0.0268P)^2^+1.1815P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0610
_refine_ls_wR_factor_ref         0.0626
_reflns_number_gt                3191
_reflns_number_total             3481
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo902333y_si_003.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 
;
_cod_original_cell_volume        1688.7(5)
_cod_database_code               4025198