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310883-83-1

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310883-83-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 310883-83-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,0,8,8 and 3 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 310883-83:
(8*3)+(7*1)+(6*0)+(5*8)+(4*8)+(3*3)+(2*8)+(1*3)=131
131 % 10 = 1
So 310883-83-1 is a valid CAS Registry Number.

310883-83-1Relevant articles and documents

Application of complex aldol reactions to the total synthesis of phorboxazole B

Evans,Fitch,Smith,Cee

, p. 10033 - 10046 (2007/10/03)

The synthesis of phorboxazole B has been accomplished in 27 linear steps and an overall yield of 12.6%. The absolute stereochemistry of the C4-C12, C33-C38, and C13-C19 fragments was established utilizing catalytic asymmetric aldol methodology, while the absolute stereochemistry of the C20-C32 fragment was derived from an auxiliary-based asymmetric aldol reaction. All remaining chirality was incorporated through internal asymmetric induction, with the exception of the C43 stereocenter which was derived from (R)-trityl glycidol. Key fragment couplings include a stereoselective double stereodifferentiating aldol reaction, a metalated oxazole alkylation, an oxazole-stabilized Wittig olefination, and a chelation-controlled addition of the fully elaborated alkenyl metal side chain.

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