Catalyzed cyclizations leading to enrichment of functionality and chirality. A general approach to dibenzocyclooctadiene lignans from alpha,omega-diynes.
Singidi, Ramakrishna Reddy; RajanBabu, T. V.; Organic letters 10 (2008) 3351–3354; doi:10.1021/ol8013792

data_1504834
_publ_section_title
;
 Catalyzed cyclizations leading to enrichment of functionality and
 chirality. A general approach to dibenzocyclooctadiene lignans from
 alpha,omega-diynes.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3351
_journal_page_last               3354
_journal_paper_doi               10.1021/ol8013792
_journal_volume                  10
_journal_year                    2008
_chemical_compound_source        'synthesis as described'
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_chemical_formula_sum            'C35 H41 B O7'
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_chemical_name_common            'RajanBabu 1635'
_chemical_name_systematic
;
 ?
;
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_cell_angle_beta                 83.617(1)
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_cell_length_b                   12.5459(1)
_cell_length_c                   15.4229(2)
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_cell_measurement_temperature    150(2)
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_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
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'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
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_diffrn_ambient_temperature      150(2)
_diffrn_detector                 'CCD plate'
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_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
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_diffrn_measurement_method       'phi and omega scans'
_diffrn_orient_matrix_type       'by Nonius Collect from scalepack cell'
_diffrn_orient_matrix_UB_11      -0.106575
_diffrn_orient_matrix_UB_12      0.668118E-1
_diffrn_orient_matrix_UB_13      -0.7053E-3
_diffrn_orient_matrix_UB_21      -0.54026E-2
_diffrn_orient_matrix_UB_22      -0.275151E-1
_diffrn_orient_matrix_UB_23      0.759671E-1
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_diffrn_orient_matrix_UB_33      0.0137
_diffrn_radiation_monochromator  graphite
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_diffrn_radiation_type           MoK\a
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_diffrn_source                   'Enraf Nonius FR590'
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_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular plate'
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.31
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_refine_ls_number_reflns         5373
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0451
_refine_ls_R_factor_gt           0.0364
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0482P)^2^+0.4503P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0906
_refine_ls_wR_factor_ref         0.0954
_reflns_number_gt                4532
_reflns_number_total             5373
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol8013792-file003.cif
_cod_data_source_block           RajanBabu1635
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1504834