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1257231-36-9

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1257231-36-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257231-36-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,2,3 and 1 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1257231-36:
(9*1)+(8*2)+(7*5)+(6*7)+(5*2)+(4*3)+(3*1)+(2*3)+(1*6)=139
139 % 10 = 9
So 1257231-36-9 is a valid CAS Registry Number.

1257231-36-9Upstream product

1257231-36-9Downstream Products

1257231-36-9Relevant academic research and scientific papers

Efficient and general asymmetric syntheses of (R)-chroman-4-amine salts

Voight, Eric A.,Daanen, Jerome F.,Hannick, Steven M.,Shelat, Bhadra H.,Kerdesky, Francis A.,Plata, Daniel J.,Kort, Michael E.

, p. 5904 - 5907 (2010)

Starting from a variety of substituted chroman-4-ones, a highly enantioselective CBS reduction using in situ-generated B-H catalyst gave (S)-chroman-4-ols. Azide inversion and reduction gave crude (R)-chroman-4- amines, which could be purified without chromatography by isolation as the (R)-mandelic or d-tartaric acid salts with good yields and excellent ee.

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