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1219720-75-8

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1219720-75-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1219720-75-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,9,7,2 and 0 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1219720-75:
(9*1)+(8*2)+(7*1)+(6*9)+(5*7)+(4*2)+(3*0)+(2*7)+(1*5)=148
148 % 10 = 8
So 1219720-75-8 is a valid CAS Registry Number.

1219720-75-8Relevant articles and documents

A new approach to the synthesis of l-3-hydroxy-4-methoxy-5-methyl-phenylalanine derivatives from l-tyrosine

Chen, Ruijiao,Zhu, Deguang,Hu, Zuoqiang,Zheng, Zhiming,Chen, Xiaochuan

, p. 39 - 42 (2010)

A practical procedure to regioselectively install a methyl group and a phenolic hydroxyl group onto l-tyrosine was developed. By using this approach, protected l-3-hydroxy-4-methoxy-5-methyl-phenylalanine and l-3-hydroxy-4-methoxy-5-methyl-phenylalanol, which are utilized in efficient syntheses of the relevant tetrahydroisoquinoline alkaloids, were prepared conveniently with high yield.

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