Intermolecular [2 + 2] Cycloaddition of 1,4-Dihydropyridines with Olefins via Energy Transfer.
Wang, Chengfeng; Lu, Zhan; Organic letters 19 (2017) 5888–5891; doi:10.1021/acs.orglett.7b02881

data_1547735
_publ_section_title
;
 Intermolecular [2 + 2] Cycloaddition of 1,4-Dihydropyridines with Olefins
 via Energy Transfer.
;
_journal_issue                   21
_journal_name_full               'Organic letters'
_journal_page_first              5888
_journal_page_last               5891
_journal_paper_doi               10.1021/acs.orglett.7b02881
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C21 H27 N O4'
_chemical_formula_sum            'C21 H27 N O4'
_chemical_formula_weight         357.44
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2016-12-01
_audit_creation_method
;
Olex2 1.2
(compiled 2014.03.20 svn.r2914 for OlexSys, GUI svn.r4816)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 100.598(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.9109(12)
_cell_length_b                   17.7633(17)
_cell_length_c                   10.9397(12)
_cell_measurement_reflns_used    1963
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.4997
_cell_measurement_theta_min      3.0975
_cell_volume                     1893.1(4)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      293.15
_diffrn_detector_area_resol_mean 10.3592
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      -0.0221138000
_diffrn_orient_matrix_UB_12      0.0342027000
_diffrn_orient_matrix_UB_13      0.0232645000
_diffrn_orient_matrix_UB_21      0.0594024000
_diffrn_orient_matrix_UB_22      0.0003635000
_diffrn_orient_matrix_UB_23      0.0473883000
_diffrn_orient_matrix_UB_31      0.0358152000
_diffrn_orient_matrix_UB_32      0.0206064000
_diffrn_orient_matrix_UB_33      -0.0395569000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0336
_diffrn_reflns_av_unetI/netI     0.0455
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            7721
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         3.10
_diffrn_source                   'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.92063
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.254
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.357
_refine_diff_density_min         -0.192
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3449
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0931
_refine_ls_R_factor_gt           0.0592
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0672P)^2^+0.6990P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1393
_refine_ls_wR_factor_ref         0.1644
_reflns_number_gt                2323
_reflns_number_total             3449
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol7b02881_si_003.cif
_cod_data_source_block           161201_wcf10117_2
_cod_depositor_comments
'Adding full bibliography for 1547735--1547738.cif.'
_cod_database_code               1547735
_chemical_oxdiff_formula         'c10 h10 n2 o8'
_reflns_odcompleteness_completeness 99.63
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B), C11(H11A,H11B), C16(H16A,H16B), C19(H19A,H19B)
2.c Aromatic/amide H refined with riding coordinates:
 N1(H1), C1(H1A), C2(H2), C3(H3), C4(H4), C5(H5)
2.d Idealised Me refined as rotating group:
 C14(H14A,H14B,H14C), C17(H17A,H17B,H17C), C20(H20A,H20B,H20C), C21(H21A,H21B,
 H21C)
;