Expedient Route to the functionalized calyciphylline A-type skeleton via a Michael addition-RCM strategy.
Sladojevich, Filippo; Michaelides, Iacovos N.; Benjamin, Darses; Ward, John W.; Dixon, Darren J.; Organic letters 13 (2011) 5132–5135; doi:10.1021/ol202000w

data_1502458
_publ_section_title
;
 Expedient Route to the functionalized calyciphylline A-type skeleton via
 a Michael addition-RCM strategy.
;
_journal_issue                   19
_journal_name_full               'Organic letters'
_journal_page_first              5132
_journal_page_last               5135
_journal_paper_doi               10.1021/ol202000w
_journal_volume                  13
_journal_year                    2011
_chemical_formula_moiety         'C23 H27 N1 O2'
_chemical_formula_sum            'C23 H27 N O2'
_chemical_formula_weight         349.47
_chemical_melting_point          ?
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             11-07-13
_audit_creation_method           CRYSTALS_ver_14.11
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   9.23960(10)
_cell_length_b                   14.8406(2)
_cell_length_c                   27.0972(3)
_cell_measurement_reflns_used    4714
_cell_measurement_temperature    150
_cell_measurement_theta_max      27
_cell_measurement_theta_min      5
_cell_volume                     3715.60(8)
_computing_cell_refinement       'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2001).'
_computing_data_reduction        'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device       Area
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.032
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            59945
_diffrn_reflns_theta_full        26.923
_diffrn_reflns_theta_max         27.473
_diffrn_reflns_theta_min         5.144
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.079
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.95
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.249
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1504
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.140
_refine_diff_density_max         0.39
_refine_diff_density_min         -0.38
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   0.9789
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         4216
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0764
_refine_ls_R_factor_gt           0.0446
_refine_ls_shift/su_max          0.0003280
_refine_ls_shift/su_mean         0.0000759
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 17.7 26.9 13.2 3.39 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1409
_refine_ls_wR_factor_gt          0.1044
_refine_ls_wR_factor_ref         0.1409
_reflns_limit_h_max              11
_reflns_limit_h_min              0
_reflns_limit_k_max              19
_reflns_limit_k_min              0
_reflns_limit_l_max              35
_reflns_limit_l_min              0
_reflns_number_gt                2854
_reflns_number_total             4216
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.47
_oxford_diffrn_Wilson_scale      14.10
_oxford_refine_ls_r_factor_ref   0.0764
_oxford_refine_ls_scale          0.2681(3)
_oxford_reflns_number_all        4216
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_oxford_structure_analysis_title 004djd11
_cod_data_source_file            ol202000w_si_002.cif
_cod_data_source_block           25
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

'_symmetry_cell_setting' value
'Orthorhombic' changed to 'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P b c a '
_cod_original_formula_sum        'C23 H27 N1 O2'
_cod_database_code               1502458
_iucr_refine_instruction_details_constraints
;
BLOCK SCALE X'S, U'S 
RIDE C   (   4,X'S) H   (  41,X'S) H   (  42,X'S) 
RIDE C   (   6,X'S) H   (  61,X'S) 
RIDE C   (   7,X'S) H   (  71,X'S) 
RIDE C   (   8,X'S) H   (  81,X'S) 
RIDE C   (   9,X'S) H   (  91,X'S) 
RIDE C   (  10,X'S) H   ( 101,X'S) 
RIDE C   (  11,X'S) H   ( 111,X'S) 
RIDE C   (  13,X'S) H   ( 131,X'S) 
RIDE C   (  14,X'S) H   ( 141,X'S) H   ( 142,X'S) 
RIDE C   (  15,X'S) H   ( 151,X'S) 
RIDE C   (  16,X'S) H   ( 161,X'S) 
RIDE C   (  17,X'S) H   ( 171,X'S) H   ( 172,X'S) 
RIDE C   (  21,X'S) H   ( 212,X'S) H   ( 211,X'S) 
RIDE C   (  22,X'S) H   ( 222,X'S) H   ( 221,X'S) 
RIDE C   (  23,X'S) H   ( 231,X'S) H   ( 232,X'S) 
RIDE C   (  24,X'S) H   ( 241,X'S) 
RIDE C   (  25,X'S) H   ( 251,X'S) H   ( 252,X'S) 
RIDE C   (  26,X'S) H   ( 262,X'S) H   ( 261,X'S) H   ( 263,X'S) 
END                                                                             
;
_iucr_refine_instruction_details_restraints
;
NO 
REM   HREST   START (DO NOT REMOVE THIS LINE) 
REM   HREST   END (DO NOT REMOVE THIS LINE) 
END                                                                             
;