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53684-30-3

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53684-30-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53684-30-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,6,8 and 4 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 53684-30:
(7*5)+(6*3)+(5*6)+(4*8)+(3*4)+(2*3)+(1*0)=133
133 % 10 = 3
So 53684-30-3 is a valid CAS Registry Number.

53684-30-3Relevant articles and documents

Chemoenzymatic and yeast-catalysed synthesis of diastereomeric ethyl γ-phenyl and γ-(n-pyridyl)paraconates

Forzato, Cristina,Furlan, Giada,Nitti, Patrizia,Pitacco, Giuliana,Valentin, Ennio,Zangrando, Ennio,Buzzini, Pietro,Goretti, Marta,Turchetti, Benedetta

, p. 2026 - 2036 (2008/12/23)

The synthesis of γ-phenyl and γ-(n-pyridyl)paraconates was accomplished by chemical reduction of their respective ketodiester precursors followed by cyclisation of the resulting hydroxy diester intermediates. The cis- and trans-lactones thus obtained were separated and separately subjected to enzymatic hydrolysis with HLAP. The cis-lactonic esters had enantiomeric excesses ranging from 94% to 99%, while for the trans-isomers the ee's ranged from 80% to 93%. The same ketodiester precursors were subjected to reduction with a series of yeasts. The absolute configuration of trans-(-)-2-pyridyl paraconic acid was assigned by means of X-ray analysis of its hydrobromide salt, while the absolute configurations of the other lactones were determined via analysis of their respective CD curves.

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