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91704-57-3

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91704-57-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91704-57-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,0 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 91704-57:
(7*9)+(6*1)+(5*7)+(4*0)+(3*4)+(2*5)+(1*7)=133
133 % 10 = 3
So 91704-57-3 is a valid CAS Registry Number.

91704-57-3Downstream Products

91704-57-3Relevant 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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