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80736-53-4

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80736-53-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80736-53-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,7,3 and 6 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 80736-53:
(7*8)+(6*0)+(5*7)+(4*3)+(3*6)+(2*5)+(1*3)=134
134 % 10 = 4
So 80736-53-4 is a valid CAS Registry Number.

80736-53-4Relevant articles and documents

Synthese von optisch aktiven, natuerlichen Carotinoiden und strukturell verwandten Naturprodukten. IX. Synthese von (3R)-Hydroxyechinenon, (3R,3'R)- und (3R,3'S)-Adonixanthin, (3R)-Adonirubin, deren optischen Antipoden und verwandten Verbindungen

Bernhard, Kurt,Englert, Gerhard,Mayer, Hans,Mueller, Robert K.,Ruettimann, August,et al.

, p. 2469 - 2484 (2007/10/02)

The synthesis of racemic and optically active hydroxyechinenone (12-14), adonixanthin (16-19), adonirubin (22-24), meso-astaxanthin (26) and their corresponding diosphenols (15, 20, 21, 25, 27, 28, and 29) by Wittig reaction is reported, starting from suitable C15-phosphonium salts and C10-aldehydes.

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