2-Oxo-1,3-bis(phenylmethyl)-4,5-imidazolidinedicarboxylic acid

45 grams of cyclic acid (0.127 mol) was added to the reaction flask.26.9 g (0.127 mol) of the right amine, Toluene 500ml, pyridine 50ml, After heating under reflux for 3 hours, the solvent was evaporated to dryness to give a reduced material.A mixture of H2L (0.3mmol, 106.3mg), bpy (0.3mmol, 46.9mg), Cu(NO3)2·2.5H2O (0.3mmol, 139.5mg), ethanol (5mL) and deionized water (10mL) was transferred into Teflon-lined stainless steel Parr bomb, and was heated at 140C for 72h. Green square crystals of [CuII(L)2][CuI(bpy)]2·4H2O (BUC-20, yield 86% based on Cu(NO3)2·2.5H2O), were collected by isolating and wishing with deionized water and ethanol in turn, after cooling down slowly to room temperature. Anal. Calc. for BUC-20 (C58H56Cu3N8O14): C, 54.4%; N, 8.8%; H, 4.4%. Found: C, 54.5%; N, 8.8%; H, 4.5%. FTIR (KBr)/cm-1: 3434, 1629, 1612, 1533, 1493, 1447, 1420, 1306, 1225, 1074, 860, 819, 771, 732, 699, 669, 642, 568, 489, 430.Weighing compounds12.0 g (32.6 mmol) of 1, 3-dibenzyl-5-methoxycarbonyl-2-one-4-carboxylic acid in 250 mLIn a three-necked flask, 60 mL of H2O was added to the reaction flask at a temperature of 28 C, and 2.6 g (65.0 mmol) of NaOH was added to the reaction solution for 2 hours, and the reaction solution was clarified, and the pH of the reaction solution was '12.An appropriate amount of concentrated hydrochloric acid is added to the reaction solution to adjust the pH of the reaction solution to ' 2, and a large amount of white solid precipitates in the reaction solution. After reacting for 1 h, suction filtration gave a white solid.That is, cis 1, 3-dibenzylimidazol-2-one-4, 5-dicarboxylic acid (10.8 g, 99.3%) had a reaction molar yield of 93.6%To the mixture of 1, 3-dibenzyl-2-oxo-imidazolidine-4, 5-dicarboxylic acid (compound 31a, 2.0 g, 5.6 mmol) in MeOH (20.0 mL) was added SOCl2 (2.0 mL), the reaction mixture was stirred at 60 oC for 16 hours, and then concentrated. The residue was dissolved in EtOAc (20 mL) and the organic layer was washed with sat.NaHCO3 twice (5 mL), dried over Na2SO4, filtered and concentrated to give compound 31b (2.1 g) as a yellow solid. LCMS (M+H+): 383.1

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Molecular Weight:354.4
XLogP3:1.8
Hydrogen Bond Donor Count:2
Hydrogen Bond Acceptor Count:5
Rotatable Bond Count:6
Exact Mass:354.12157168
Monoisotopic Mass:354.12157168
Topological Polar Surface Area:98.2
Heavy Atom Count:26
Complexity:494
Undefined Atom Stereocenter Count:2
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes