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68199-31-5

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68199-31-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68199-31-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,1,9 and 9 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 68199-31:
(7*6)+(6*8)+(5*1)+(4*9)+(3*9)+(2*3)+(1*1)=165
165 % 10 = 5
So 68199-31-5 is a valid CAS Registry Number.

68199-31-5Relevant articles and documents

Synthesis of α-methyl kainic acid by stereospecific lithiation-dearomatizing cyclization of a chiral benzamide

Clayden, Jonathan,Knowles, Faye E.,Menet, Christel J.

, p. 3397 - 3400 (2003)

Stereospecific lithiation of N-α-methylbenzyl benzamides gives configurationally stable tertiary benzyllithiums which undergo a stereospecific dearomatizing cyclization with >99% retention of stereochemistry. The products are partially saturated isoindolinones which carry a new fully-substituted stereogenic centre. A ten-step sequence converts one of these products to the α-methyl analogue of kainic acid.

Practical asymmetric synthesis of β-trichloromethyl-β-hydroxy ketones by the reaction of chloral or chloral hydrate with chiral imines

Funabiki, Kazumasa,Honma, Norihiro,Hashimoto, Wataru,Matsui, Masaki

, p. 2059 - 2061 (2007/10/03)

(Matrix presented) Chloral or its hydrate undergoes the carbon-carbon bond-formation reaction with various optically active imines in the absence of any additive, followed by hydrolysis, to produce the corresponding β-trichloromethyl-β-hydroxy ketones in

NADH MODELS XXI. STEREOSELECTIVE REDUCTION OF CHIRAL IMINES WITH HANTZSCH ESTER

van Niel, Johannes C.G.,Pandit, Upendra K.

, p. 6005 - 6012 (2007/10/02)

Imines derived from p-substituted acetophenones and (+) R-1-phenylethylamine are reduced by 3,5-diethoxycarbonyl-2,6-dimethyl-1,4-dihydro-pyridine (Hantzsch ester), in acetonitrile, in the presence of magnesium perchlorate, to diastereomeric mixtures of t

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