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57999-77-6

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57999-77-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57999-77-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,9 and 9 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 57999-77:
(7*5)+(6*7)+(5*9)+(4*9)+(3*9)+(2*7)+(1*7)=206
206 % 10 = 6
So 57999-77-6 is a valid CAS Registry Number.

57999-77-6Relevant articles and documents

Microwave assisted Perkin reaction for the synthesis of α-arylidine-γ-phenyl-Δ, β, γ-butenolides

Deo, Sujata,Chaudhari, Tanishq,Inam, Farhin

, p. 363 - 367 (2014/05/06)

Perkin condensation with subsequent intramolecular lactonisation as one pot synthesis of α-arylidine-γ-phenyl-Δ,β,γ- butenolides have been studied under microwave irradiation. The butenolides are cleaved to give keto acids, which are the precursors of pericarbonyl lactone lignans possessing variety of biological activities. Syntheses of butenolides have been carried out using pyridine as a catalyst under microwave conditions. The generality of this protocol has been demonstrated by synthesizing a variety of substituted butenolides in excellent yields, short reaction time and with good purity compared to those under classical thermal conditions. All the products have been characterized by their IR, 1H NMR and UV spectral values.

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