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133056-50-5

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133056-50-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133056-50-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,0,5 and 6 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 133056-50:
(8*1)+(7*3)+(6*3)+(5*0)+(4*5)+(3*6)+(2*5)+(1*0)=95
95 % 10 = 5
So 133056-50-5 is a valid CAS Registry Number.

133056-50-5Relevant articles and documents

Total synthesis and absolute stereochemistry of seragakinone A

Takada, Akiomi,Hashimoto, Yoshimitsu,Takikawa, Hiroshi,Hikita, Katsuyoshi,Suzuki, Keisuke

supporting information; experimental part, p. 2297 - 2301 (2011/04/16)

(Chemical Equation Presented) Cyclic transformation: The key transformations of the asymmetric total synthesis of the marine-derived natural product seragakinone A are two N-heterocyclic carbene catalyzed benzoin cyclizations that result in the construction of two rings and a pinacol-type rearrangement to install the angular prenyl substituent.

Synthetic Approaches to the Alkaloids of the Ancistrocladaceae: (-)-O-Methylancistrocladine and (+)-O-Methylhamatine

Rizzacasa, Mark A.,Sargent, Melvyn V.

, p. 894 - 896 (2007/10/02)

An asymmetric total synthesis of the naphthylisoquinoline alkaloid (-)-O-methylancistrocladine (2) is described; the synthetic method also provides routes to the atropisomer O-methylhamatine (4) and the enantiomers of these alkaloids.

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