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945736-78-7

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945736-78-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 945736-78-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,5,7,3 and 6 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 945736-78:
(8*9)+(7*4)+(6*5)+(5*7)+(4*3)+(3*6)+(2*7)+(1*8)=217
217 % 10 = 7
So 945736-78-7 is a valid CAS Registry Number.

945736-78-7Relevant articles and documents

Diastereodivergent strategies for the synthesis of homochiral aculeatins

Peuchmaur, Marine,Wong, Yung-Sing

, p. 5374 - 5379 (2008/02/09)

(Chemical Equation Presented) We report concise and stereocontrolled syntheses of aculeatins (-)-A, (+)-B, (+)-D, and (+)-6-epi-D. Diastereodivergent 1,3-inductions in Mukaiyama aldol coupling contribute to reduce steps and to increase flexibility with reactants having sterically restricted proximal substituents (i.e., CH2), involving either a good anti or a moderate syn 1,3-induction, depending on the nature of protecting group (P). In addition, the 3,5-syn-diol-ketone resulting from concomitant deprotection of the β-alkoxy (Tr = trityl) group proves to be remarkably stable whereas the 3,5-anti diastereoisomer cyclizes spontaneously to the corresponding tetrahydropyran hemiketal, thus enabling a useful and facile separation. The second part of our study is devoted to improving the yield and the diastereoselectivity of the final phenolic oxidation reaction leading to aculeatins.

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