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116724-98-2

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116724-98-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 116724-98-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,7,2 and 4 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 116724-98:
(8*1)+(7*1)+(6*6)+(5*7)+(4*2)+(3*4)+(2*9)+(1*8)=132
132 % 10 = 2
So 116724-98-2 is a valid CAS Registry Number.

116724-98-2Relevant articles and documents

Total Synthesis of (+/-)-Dimethyl Jaconate

Klein, Larry L.,Shanklin, Michael S.

, p. 5202 - 5209 (1988)

The total synthesis of a cyclic necic acid derivative, (+/-)-dimethyl jaconate, is described as a seven-step sequence starting from 3,4-dichloro-2-furoic acid.The key step involves an intramolecular cycloaddition of furfuryl allyl sulfide 21b, establishing the desired relative stereochemistry of the three asymmetric centers on the tetrahydrofuran ring.The 1,2-dichloro olefin thus produced is uncovered as a diester equivalent through an ozonolysis reaction in methanol.Raney nickel desulfurization then reduces the linking sulfur bridge to produce the desired target, though as an epimeric mixture at the C6 hydroxyethyl center.This problem is addressed with a study of the stereoselective reductions of intermediate ketones 24 and 25, with the latter ketone affording a 4:1 ratio of products favoring the desired epimer.

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