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CAS RN: 1450841-27-6 | Product Number: B4228


Purity: >90.0%(HPLC)
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Product Number B4228
Purity / Analysis Method >90.0%(HPLC)
Molecular Formula / Molecular Weight C__4__1H__3__9N__3O__2 = 605.78  
Physical State (20 deg.C) Solid
CAS RN 1450841-27-6
PubChem Substance ID 253659536
Appearance White to Light yellow powder to crystal
Purity(HPLC) min. 90.0 area%
Specific rotation [a]20/D -173 to -183 deg(C=1, CHCl3)
Properties (reference)
Specific Rotation -174° (C=1,CHCl3)
Related Laws:
Transport Information:
HS Number 2934999090
An Efficient Bis(oxazolidine)pyridine Ligand Utilizing for the Asymmetric [3+2] Cycloaddition


Experimental Procedure:
Bis(oxazolidine)pyridine ligand (B4228, 0.0165 mmol) and Cu(OAc)2 (0.015 mmol) are added to a round flask containing a stir bar under Ar. CH2Cl2 (1 mL) is added to the flask and the mixture is stirred over 12 hours. To the resulting solution is added azomethine imine (0.15 mmol) at rt. After cooling to –40 °C, to the mixture is added ethyl propiolate (0.18 mmol). After stirring for 47 hours, the reaction mixture is purified by silica gel column chromatography (Et2O/Hexane=2/1 to Et2O) to afford the desired N,N-bicyclic pyrazolidinone derivative (99% yield, 94% ee).


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