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1398243-93-0

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1398243-93-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1398243-93-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,9,8,2,4 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1398243-93:
(9*1)+(8*3)+(7*9)+(6*8)+(5*2)+(4*4)+(3*3)+(2*9)+(1*3)=200
200 % 10 = 0
So 1398243-93-0 is a valid CAS Registry Number.

1398243-93-0Upstream product

1398243-93-0Downstream Products

1398243-93-0Relevant articles and documents

Total synthesis of natural enantiomers of heliespirones A and C via the diastereoselective intramolecular Hosomi-Sakurai reaction

Miyawaki, Akari,Kikuchi, Daisuke,Niki, Masu,Manabe, Yuki,Kanematsu, Makoto,Yokoe, Hiromasa,Yoshida, Masahiro,Shishido, Kozo

, p. 8231 - 8243 (2012)

A full account of the development of a novel type of the intramolecular Hosomi-Sakurai reactions of the substrates with a pbenzoquinone and an allylsilane moieties connected by an ether linkage is described. This transformation proceeds via an addition-elimination sequence and provides the products with two stereogenic centers through a 1,3(or 1,4)-asymmetric induction in good to excellent diastereoselectivities. A reasonable mechanistic possibility for the reaction, determination of the stereochemistry for the product, and scope and limitation of the transformation are also discussed. The methodology developed here can successfully be applied to the enantiocontrolled total synthesis of the natural enantiomers of (-)-heliespirone A and (+)-heliespirone C, which have been isolated from sunflower Helianthus annuus L. as allelochemicals.

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