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24237-31-8

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24237-31-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 24237-31-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,4,2,3 and 7 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 24237-31:
(7*2)+(6*4)+(5*2)+(4*3)+(3*7)+(2*3)+(1*1)=88
88 % 10 = 8
So 24237-31-8 is a valid CAS Registry Number.

24237-31-8Relevant articles and documents

Total synthesis of natural and unnatural lamellarins with saturated and unsaturated D-rings

Ploypradith, Poonsakdi,Petchmanee, Thaninee,Sahakitpichan, Poolsak,Litvinas, Nichole D.,Ruchirawat, Somsak

, p. 9440 - 9448 (2007/10/03)

(Chemical Equation Presented) Twenty-eight natural and unnatural lamellarins with either a saturated or an unsaturated D-ring were synthesized according to our developed synthetic route. The key step involved the Michael addition/ring closure (Mi-RC) of the benzyldihydroisoquinoline and α-nitrocinnamate derivatives, which provided the 2-carboethoxypyrrole intermediates in moderate to good yields (up to 78% yield). Subsequent hydrogenolysis/lactonization furnished lamellarins with a saturated D-ring in excellent yields (up to 93% yield). DDQ oxidation of the saturated lamellarin acetates led directly to the corresponding unsaturated analogues in 54-95% yield. In addition, only two steps in our developed strategy require column chromatography.

Ruthenium(IV) tetrakis(trifluoroacetate), a new oxidizing agent. III. An efficient access to the aporphine and homoaporphine skeletons and their structural studies

Landais,Rambault,Robin

, p. 543 - 546 (2007/10/02)

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