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141935-55-9

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141935-55-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 141935-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,9,3 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 141935-55:
(8*1)+(7*4)+(6*1)+(5*9)+(4*3)+(3*5)+(2*5)+(1*5)=129
129 % 10 = 9
So 141935-55-9 is a valid CAS Registry Number.

141935-55-9Downstream Products

141935-55-9Relevant articles and documents

Synthesis and transannular Diels-Alder reaction of a 13-membered macrocyclic triene. A synthetic approach towards the tricyclic part A.B.C.[6.6.5] of the veratrum alkaloids

Quimpere,Ruest,Deslongchamps

, p. 132 - 140 (1992)

The syntheses of the acyclic triene cis-trans-trans (3Z,9Z,11E)-13-chloro-3-methoxy-1,1,7,7-tetrakis(methoxycarbonyl)-4- methyltrideca-3,9,11-triene (25), and the corresponding trans-cis-trans (3Z,9E,11E) isomer 37, and trans-trans-trans (3Z,9E,11E) isomer, 46, are described. Compounds 25 and 37 furnished in good yield 13-membered macrocyclic compounds (3Z,9Z,11E)- and (3Z,9E,11Z)-3-methoxy-1,1,7,7-tetrakis(methoxycarbonyl)-4- methylcyclotride-ca-3,9,11-triene (26) and (38) which led to tricyclic compound (cis-anti-cis)-2-methoxy-4,4,11,11-tetrakis(methoxycarbonyl)-1- methyl-tricyclo[7.4.0.02,6]tridec-7-ene (27) by transannular Diels-Alder reaction. Macrocyclization of trans-trans-trans chloride 46 was not successful.

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