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157670-10-5

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157670-10-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157670-10-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,6,7 and 0 respectively; the second part has 2 digits, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 157670-10:
(8*1)+(7*5)+(6*7)+(5*6)+(4*7)+(3*0)+(2*1)+(1*0)=145
145 % 10 = 5
So 157670-10-5 is a valid CAS Registry Number.

157670-10-5Relevant articles and documents

The synthesis of roeharmine and (-)-1,2,3,4-tetrahydroroeharmine

Sreenivasa Reddy,Cook, James M.

, p. 5413 - 5416 (2007/10/02)

The total synthesis of roeharmine 1 as well as an enantiospecific synthesis of (-)-1,2,3,4-tetrahydroroeharmine 2 has been achieved via the Pictet-Spengler reaction as a key step. The optical rotation of synthetic (- )-2 was found to be higher than that reported for the natural product. A possible mechanism for the racemization of 2 upon exposure to acid has been proposed and serves as a warning to alkaloid chemists who isolate ring-A alkoxylated indole alkaloids under acidic conditions.

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