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701261-90-7

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701261-90-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 701261-90-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,0,1,2,6 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 701261-90:
(8*7)+(7*0)+(6*1)+(5*2)+(4*6)+(3*1)+(2*9)+(1*0)=117
117 % 10 = 7
So 701261-90-7 is a valid CAS Registry Number.

701261-90-7Relevant articles and documents

Total Synthesis of (+)-Prunustatin A: Utility of Organotrifluoroborate-Mediated Prenylation and Shiina MNBA Esterification and Macrolactonization to Avoid a Competing Thorpe-Ingold Effect Accelerated Transesterification

Chojnacka, Maja W.,Batey, Robert A.

, p. 5671 - 5675 (2018)

A convergent total synthesis of (+)-prunustatin A is described through the assembly of two key fragments and a macrolactonization. Shiina MNBA couplings were used for the formation of each of the four ester bonds in the tetralactone ring, including the key macrocyclization which was essential to minimize competing Thorpe-Ingold accelerated transesterification. Other key steps included an organoboron-based prenylation using potassium prenyltrifluoroborate and a carbonyldiimidazole-mediated coupling to form the salicylamide.

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