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220580-85-8

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220580-85-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 220580-85-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,5,8 and 0 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 220580-85:
(8*2)+(7*2)+(6*0)+(5*5)+(4*8)+(3*0)+(2*8)+(1*5)=108
108 % 10 = 8
So 220580-85-8 is a valid CAS Registry Number.

220580-85-8Relevant articles and documents

Oxazole Synthesis by Sequential Asmic-Ester Condensations and Sulfanyl-Lithium Exchange-Trapping

Mueller, Louis G.,Chao, Allen,Alwedi, Embarek,Natrajan, Maanasa,Fleming, Fraser F.

, p. 1500 - 1503 (2021/03/08)

Oxazoles are rapidly assembled through a sequential deprotonation-condensation of Asmic, anisylsulfanylmethylisocyanide, with esters followed by sulfanyl-lithium exchange-trapping. Deprotonating Asmic affords a metalated isocyanide that efficiently traps esters to afford oxazoles bearing a versatile C-4 anisylsulfanyl substituent. Interchange of the anisylsulfanyl substituent is readily achieved through a first-in-class sulfur-lithium exchange-electrophilic trapping sequence whose versatility is illustrated in the three-step synthesis of the bioactive natural product streptochlorin.

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