Stereoselective synthesis of sugar-fused (or 1,2-annulated) isochromans and isochromanones by using oxa-Pictet-Spengler reaction.
Verma, Ashish Kumar; Chennaiah, Ande; Dubbu, Sateesh; Vankar, Yashwant D.; Organic & biomolecular chemistry 16 (2018) 8258–8262; doi:10.1039/c8ob01698d

data_7156408
_publ_section_title
;
 Stereoselective synthesis of sugar-fused (or 1,2-annulated) isochromans
 and isochromanones by using oxa-Pictet-Spengler reaction.
;
_journal_issue                   37
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              8258
_journal_page_last               8262
_journal_paper_doi               10.1039/c8ob01698d
_journal_volume                  16
_journal_year                    2018
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C20 H22 O10'
_chemical_formula_sum            'C20 H22 O10'
_chemical_formula_weight         422.37
_space_group_crystal_system      orthorhombic
_space_group_IT_number           20
_space_group_name_Hall           'C 2c 2'
_space_group_name_H-M_alt        'C 2 2 21'
_symmetry_space_group_name_Hall  'C 2c 2'
_symmetry_space_group_name_H-M   'C 2 2 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2017-10-05
_audit_creation_method
;
Olex2 1.2-alpha
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-06-06 deposited with the CCDC.
2018-09-05 downloaded from the CCDC.
;
_cell_angle_alpha                90.000(5)
_cell_angle_beta                 90.000(5)
_cell_angle_gamma                90.000(5)
_cell_formula_units_Z            8
_cell_length_a                   10.047(5)
_cell_length_b                   15.961(5)
_cell_length_c                   24.731(5)
_cell_measurement_reflns_used    4949
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.3
_cell_measurement_theta_min      2.5
_cell_volume                     3966(2)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scan'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0469
_diffrn_reflns_av_unetI/netI     0.0466
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            20164
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.323
_diffrn_reflns_theta_min         2.533
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.115
_exptl_absorpt_correction_T_max  0.994
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.415
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1776
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.283
_refine_diff_density_min         -0.275
_refine_diff_density_rms         0.072
_refine_ls_abs_structure_details
;
 Flack x determined using 1586 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.6(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     275
_refine_ls_number_reflns         4949
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0620
_refine_ls_R_factor_gt           0.0446
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0462P)^2^+1.8756P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0930
_refine_ls_wR_factor_ref         0.0997
_reflns_Friedel_coverage         0.802
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                4110
_reflns_number_total             4949
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8ob01698d2.cif
_cod_data_source_block           12julb_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Empirical' changed to
'empirical' according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7156405--7156408.cif.

2025-03-31
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_moiety     '2(C20 H22 O10)'
_cod_original_formula_sum        'C40 H44 O20'
_cod_original_formula_units_Z    4
_cod_original_formula_weight     844.75
_cod_database_code               7156408
_shelx_shelxl_version_number     2016/6
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C11(H11), C14(H14), C15(H15), C9(H9), C8(H8)
2.b Secondary CH2 refined with riding coordinates:
 C18(H18A,H18B)
2.c Aromatic/amide H refined with riding coordinates:
 C4(H4), C3(H3), C7(H7)
2.d Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C17(H17A,H17B,H17C), C20(H20A,H20B,H20C), C13(H13A,H13B,H13C)
;
_shelx_res_checksum              96270
_olex2_submission_special_instructions 'No special instructions were received'