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138433-61-1

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138433-61-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138433-61-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,3 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 138433-61:
(8*1)+(7*3)+(6*8)+(5*4)+(4*3)+(3*3)+(2*6)+(1*1)=131
131 % 10 = 1
So 138433-61-1 is a valid CAS Registry Number.

138433-61-1Relevant articles and documents

Synthesis of (+)-obtusenyne

Mak, S.Y. Frankie,Curtis, Neil R.,Payne, Andrew N.,Congreve, Miles S.,Wildsmith, Andrew J.,Francis, Craig L.,Davies, John E.,Pascu, Sofia I.,Burton, Jonathan W.,Holmes, Andrew B.

supporting information; experimental part, p. 2867 - 2885 (2009/06/17)

An enantioselective synthesis of the halogenated medium-ring ether natural product (+)-obtusenyne is reported which uses the ring expansion of a seven-membered ketene acetal by means of a Claisen rearrangement to construct the core nine-membered oxygen he

Synthetic studies on palytoxin. Stereocontrolled, practical synthesis of the C.101-C.115 segment

Ko,Klein,Pfaff,Kishi

, p. 4415 - 4418 (2007/10/02)

A stereocontrolled and practical synthetic route to the acetal 2a, a degradation product of palytoxin, in optically active form is described.

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