A synthesis of carbasugar-sugar pseudodisaccharides via a cycloaddition-cycloreversion reaction of 2H-pyran-2-ones.
Afarinkia, Kamyar; Haji Abdullahi, Mohamed; Scowen, Ian J.; Organic letters 12 (2010) 5564–5566; doi:10.1021/ol102358s

data_1503315
_publ_section_title
;
 A synthesis of carbasugar-sugar pseudodisaccharides via a
 cycloaddition-cycloreversion reaction of 2H-pyran-2-ones.
;
_journal_issue                   23
_journal_name_full               'Organic letters'
_journal_page_first              5564
_journal_page_last               5566
_journal_paper_doi               10.1021/ol102358s
_journal_volume                  12
_journal_year                    2010
_chemical_absolute_configuration syn
_chemical_formula_sum            'C23 H35 O9'
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_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           4
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_cell_angle_gamma                90.00
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_cell_length_b                   8.5252(2)
_cell_length_c                   21.5504(6)
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_cell_measurement_temperature    173(2)
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_cell_volume                     2341.26(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
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_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
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_diffrn_radiation_source         'fine-focus sealed tube'
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_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.9654
_exptl_absorpt_correction_T_min  0.9478
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_exptl_absorpt_process_details   'Bruker SAINT'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.292
_exptl_crystal_density_meas      ?
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_exptl_crystal_F_000             980
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_exptl_crystal_size_min          0.36
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_refine_ls_number_reflns         6623
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_refine_ls_R_factor_all          0.0580
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_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1072P)^2^+0.3417P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1428
_refine_ls_wR_factor_ref         0.1480
_reflns_number_gt                5836
_reflns_number_total             6623
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol102358s_si_003.cif
_cod_data_source_block           mha390f3a_01m
_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.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1503315