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344558-74-3

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344558-74-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 344558-74-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,4,5,5 and 8 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 344558-74:
(8*3)+(7*4)+(6*4)+(5*5)+(4*5)+(3*8)+(2*7)+(1*4)=163
163 % 10 = 3
So 344558-74-3 is a valid CAS Registry Number.

344558-74-3Relevant articles and documents

Composes heterocycliques spiranniques. V. Synthese et etude configurationnelle dans la serie de l'oxa-2 spirodecane

Picard, Philippe,Moulines, Jean,Lecoustre, Max

, p. 65 - 70 (2007/10/02)

The 8-t-butyl-2-oxaspirodecan-3-one, 8-t-butyl-2-oxaspirodecane and its 3-methylated derivatives were synthesized by different routes starting from methyl 4-t-butylcyclohexanecarboxylate, 4-t-butylmethylenecyclohexane and methyl 4-t-butylcyclohexylidenecyanoacetate.The cis (-CH2O axial) and trans (-CH2O equatorial) isomers were isolated by preparative HPLC ; their configurations were established from (1) the known stereoselectivity of the reaction involved in the cis/trans ratio controlling step (2) their proton and 13C nmr spectra.

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