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3197-43-1

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3197-43-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3197-43-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,1,9 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3197-43:
(6*3)+(5*1)+(4*9)+(3*7)+(2*4)+(1*3)=91
91 % 10 = 1
So 3197-43-1 is a valid CAS Registry Number.

3197-43-1Downstream Products

3197-43-1Relevant articles and documents

An efficient approach to 2-substituted N-tosylpiperdines: asymmetric synthesis of 2-(2-hydroxy substituted)piperidine alkaloids

Bisai, Alakesh,Singh, Vinod K.

, p. 1907 - 1910 (2007/10/03)

We have developed an efficient and a general approach to chiral 2-substituted N-tosylpiperidines starting from chiral α-substituted-N-tosylaziridines. Using this approach, we have synthesized (+)-coniine. The synthesis of chiral N-tosyl-2-piperidinylethanol 15 and ent-15, was achieved from l- and d-aspartic acids, respectively in few steps. Piperidine 15 was converted into 2-(2-hydroxysubstituted)piperidines of type 2 in optically active form. By applying this strategy, asymmetric syntheses of halosaline (R,R)-2a, (+)- and (-)-sedamine 2b, (+)- and (-)-allosedamine 2c, (+)- and (-)-sedridine 2d, (+)- and (-)-allosedridine 2e, (+)-tetraponerine T-3 3a, T-4 3c, T-7 3b, and T-8 3d have been achieved in high yields. These stereoisomers can be interconverted via Mitsunobu inversion in excellent yields.

2-(Penta-1,3-dienyl)oxazolidines: Synthesis of hydroxylated piperidines by a stereoselective Diels-Alder reaction

Hussain,Wyatt

, p. 2123 - 2130 (2007/10/02)

Hexa-2,4-dienal condensed with (-)-ephedrine to give predominantly the oxazolidine 4, which underwent a stereoselective Diels-Alder reaction with benzyl nitrosoformate to give the cycloadducts 9 and 10 in a ca 5:2 ratio. Further transformations of 9 to give the optically active mono- and tri-hydroxypiperidine derivatives 11 and 15 have also been performed.

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