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68314-26-1

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68314-26-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68314-26-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,3,1 and 4 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 68314-26:
(7*6)+(6*8)+(5*3)+(4*1)+(3*4)+(2*2)+(1*6)=131
131 % 10 = 1
So 68314-26-1 is a valid CAS Registry Number.

68314-26-1Downstream Products

68314-26-1Relevant articles and documents

New route to 3-(substituted) methyl 1-oxa- and (1-thia)cephems from 3-exomethylene intermediates via sulfenyl chloride adducts

Aoki,Konoike,Itani,et al.

, p. 2515 - 2526 (2007/10/02)

Addition of methane- and benzenesulfenyl chlorides to 3-exomethylene-1-oxacephams 10 and 14 gave 3β-sulfenyl-3α-chloromethyl adducts 11 and 15. Nucleophilic substitution of the adducts proceeded facilely to afford compounds 18-23, which were converted into Δ3-dervatives 26 and 27 by oxidative elimination. This new route, as illustrated by the sequence 6 → 7 → 8 → 3, has an essential advantage in using the saturated intermediated 7 and 8 with a stabler β-lactam ring which is compatible in nucleophilic substitution, alkaline ester hydrolysis and further manipulations. These synthetic features are well demonstrated by successful synthesis of 1-oxacefamandol 35 and 7β-(2-thienylacetyl-amino)-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-ceph em-4-carboxylic acid (45).

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