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1217899-98-3

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1217899-98-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1217899-98-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,7,8,9 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1217899-98:
(9*1)+(8*2)+(7*1)+(6*7)+(5*8)+(4*9)+(3*9)+(2*9)+(1*8)=203
203 % 10 = 3
So 1217899-98-3 is a valid CAS Registry Number.

1217899-98-3Downstream Products

1217899-98-3Relevant articles and documents

Synthesis of dihydroplakortin, 6-epi-dihydroplakortin, and their C10-desethyl analogues

Gemma, Sandra,Gabellieri, Emanuele,Coccone, Salvatore Sanna,Marti, Francesc,Taglialatela-Scafati, Orazio,Novellino, Ettore,Campiani, Giuseppe,Butini, Stefania

experimental part, p. 2333 - 2340 (2010/07/04)

(Figure Presented) The first synthesis of the marine endoperoxide 9,10-dihydroplakortin, of its C10-desethyl analogue, and of their corresponding C6 epimers is described. Stereogenic centers at C4 and at the lateral chain have been stereoselectively synthesized through Evans' chiral auxiliary chemistry. Moreover, the reported synthesis features a one-pot three-step hydroperoxysilylation/cyclization reaction for the construction of the endoperoxide ring system. Homologation of the aldehyde resulting from diol cleavage through a Wittig-based strategy gave access to the ester-containing lateral chain at C3.

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