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131831-74-8

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131831-74-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131831-74-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,8,3 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 131831-74:
(8*1)+(7*3)+(6*1)+(5*8)+(4*3)+(3*1)+(2*7)+(1*4)=108
108 % 10 = 8
So 131831-74-8 is a valid CAS Registry Number.

131831-74-8Relevant articles and documents

Ambergris compounds from labdanolic acid

Urones,Basabe,Marcos,Gonzalez,Jimenez,Sexmero,Lithgow

, p. 9991 - 9998 (1992)

Labdanolic acid (Cistus ladaniferus) is transformed into derivatives with amber odor. The strategy used allowed a process in which the oxidative decarboxylation reaction was carried out with the hydroxyl group protected.

A formal synthesis of (±)-Ambrox

Snowden,Linder

, p. 4119 - 4120 (2007/10/02)

Bicyclic diol 6, a direct precursor of (±)-Ambrox ((±)-7), has been synthesised in four steps (35% yield) from the known bicyclic enone 2.

Triterpenoid Total Synthesis, I: Synthesis of Ambrein and Ambrox

Mori, Kenji,Tamura, Hiroshi

, p. 361 - 368 (2007/10/02)

The first total synthesis of (+)-ambrein (1), a triterpene alcohol isolated from ambergris, was achieved.Both the enantiomers of ambrox (2) were also synthesized.

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