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1257108-81-8

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1257108-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257108-81-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,1,0 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1257108-81:
(9*1)+(8*2)+(7*5)+(6*7)+(5*1)+(4*0)+(3*8)+(2*8)+(1*1)=148
148 % 10 = 8
So 1257108-81-8 is a valid CAS Registry Number.

1257108-81-8Downstream Products

1257108-81-8Relevant articles and documents

Synthesis of β-methoxyacrylate natural products based on box-Pd IIcatalyzed intermolecular methoxycarbonylation of alkynoles

Motodate, Satoshi,Kobayashi, Takuya,Fujii, Mikio,Mochida, Tomoyuki,Kusakabe, Taichi,Katoh, Shigeki,Akita, Hiroyuki,Kato, Keisuke

experimental part, p. 2221 - 2230 (2011/06/21)

Bis(oxazoline)-palladium(II) catalyzed carbonylation of homopropargyl alcohols afforded acyclic methoxyacrylate 2 and 6-membered lactone 3a-k in good combined yield. In the case of propargyl alcohols, 5-membered lactones 3p, 3q, 16 were obtained in moderate yields. The one-pot synthesis of kawa lactones 3a, 3r, 3s and formal synthesis of dihydroxycystothiazole A and dihydroxycystothiazole C are presented. To elucidate the stereochemistry of (+)-annularin G and (-)-annularin H, the first asymmetric syntheses of these natural products were achieved.

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