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16957-27-0

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16957-27-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16957-27-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,5 and 7 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 16957-27:
(7*1)+(6*6)+(5*9)+(4*5)+(3*7)+(2*2)+(1*7)=140
140 % 10 = 0
So 16957-27-0 is a valid CAS Registry Number.

16957-27-0Upstream product

16957-27-0Relevant articles and documents

Stereoselective intramolecular 6-exo-Heck reaction : A facile synthetic route to podocarpa-8,11,13-triene and diterpenoid resin acids intermediates

Mukhopadhyaya, Jayanta K.,Ghosh, Ajit K.,Ghatak, Usha Ranjan

, p. 835 - 837 (2007/10/03)

Intramolecular Heck reaction of the olefins 1a-c in the presence of sodium formate affords ca 3:1 mixtures of the respective trans- and cis-octahydrophenanthrenes 3a-c and 4a-c. Similar reaction of the olefmic ester 2 provides a 70:30 mixture of (±)-methyl desisopropyldehydroabietate 6 and (±)10-epi-methyl desoxypodocarpate 7.

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