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745818-78-4

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745818-78-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 745818-78-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,4,5,8,1 and 8 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 745818-78:
(8*7)+(7*4)+(6*5)+(5*8)+(4*1)+(3*8)+(2*7)+(1*8)=204
204 % 10 = 4
So 745818-78-4 is a valid CAS Registry Number.

745818-78-4Relevant articles and documents

Towards the total synthesis of calyculin C: Preparation of the C 9-C25 spiroketal-dipropionate unit

Habrant, Damien,Koskinen, Ari M. P.

experimental part, p. 4364 - 4373 (2010/11/05)

An asymmetric synthesis of the C9-C25 spiroketal fragment of calyculin C is described. Key steps include two crotylation reactions using successively BrowN′s reagent and (Z)-crotyltrifluorosilane for the formation of the anti, anti, anti stereotetrad, ynone formation by a Pd-catalyzed coupling of a thiol ester with a terminal alkyne and a double intramolecular hetero-Michael addition for the stereoselective construction of the spiroketal framework.

Studies towards the synthesis of the C(9)-C(20) lactone-dipropionate fragment of calyculin C

Karisalmi, Kaisa,Koskinen, Ari M. P.

, p. 1331 - 1342 (2007/10/03)

In this paper we describe the synthesis of a diastereomer of the C(9)-C(20) dipropionate-lactone fragment of Calyculin C. A short and enantioselective synthesis of the key intermediate 2 has been developed. This intermediate will play a critical role also

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