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1031685-35-4

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1031685-35-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1031685-35-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,3,1,6,8 and 5 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1031685-35:
(9*1)+(8*0)+(7*3)+(6*1)+(5*6)+(4*8)+(3*5)+(2*3)+(1*5)=124
124 % 10 = 4
So 1031685-35-4 is a valid CAS Registry Number.

1031685-35-4Upstream product

1031685-35-4Downstream Products

1031685-35-4Relevant articles and documents

An improved synthesis of (3R)-2-(tert-Butoxycarbonyl)-7-hydroxy-1,2,3,4- tetrahydroisoquinoline-3-carboxylic acid

Liu, Cong,Thomas, James B.,Brieaddy, Larry,Berrang, Bertold,Carroll, F. Ivy

, p. 856 - 858 (2008)

An improved synthesis of (3R)-2-(tert-butoxycarbonyl)-7-hydroxy-1,2,3,4- tetrahydroisoquinoline-3-carboxylic acid is described wherein a modified Pictet-Spengler reaction was employed to provide 95% yield of the product with 7% racemization or less. The enantiomeric excess of the final product was improved to 99.4% via recrystallization. The overall yield of this four-step synthesis provides the title compound in 43% starting from D-tyrosine. Georg Thieme Verlag Stuttgart.

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