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1301717-33-8

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1301717-33-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1301717-33-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,1,7,1 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1301717-33:
(9*1)+(8*3)+(7*0)+(6*1)+(5*7)+(4*1)+(3*7)+(2*3)+(1*3)=108
108 % 10 = 8
So 1301717-33-8 is a valid CAS Registry Number.

1301717-33-8Relevant articles and documents

Synthesis of quaternary carbon stereocenters by copper-catalyzed asymmetric allylic substitution of allyl phosphates with arylboronates

Takeda, Momotaro,Takatsu, Keishi,Shintani, Ryo,Hayashi, Tamio

, p. 2354 - 2367 (2014/04/17)

A copper-catalyzed asymmetric allylic substitution of γ,γ- disubstituted allyl phosphates with arylboronates has been developed for the construction of quaternary stereocenters. High regio- and enantioselectivities have been achieved by employing a hydroxy-bearing chiral N-heterocyclic carbene ligand, and both E and Z substrates provide the same enantiomer as the major product. The mechanistic aspect of this catalysis has also been investigated to find that a 1:1 copper/ligand complex is most likely responsible for the present asymmetric catalysis, and the reaction proceeds with almost perfect 1,3-anti stereochemistry with respect to the allylic electrophile.

Enantioselective construction of quaternary stereogenic centers from tertiary boronic esters: Methodology and applications

Sonawane, Ravindra P.,Jheengut, Vishal,Rabalakos, Constantinos,Larouche-Gauthier, Robin,Scott, Helen K.,Aggarwal, Varinder K.

supporting information; experimental part, p. 3760 - 3763 (2011/06/22)

Pin it down: A range of substrates that bear versatile functional groups with quaternary stereogenic centers have been prepared with very high enantioselectivity from tertiary boronic esters (see scheme; Cb=N,N-diisopropylcarbamoyl, pin=pinacolato). The preparation of allylboronic esters bearing contiguous quaternary and tertiary stereogenic centers, and applications to natural product synthesis are also reported.

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