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98168-21-9

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98168-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98168-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,1,6 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 98168-21:
(7*9)+(6*8)+(5*1)+(4*6)+(3*8)+(2*2)+(1*1)=169
169 % 10 = 9
So 98168-21-9 is a valid CAS Registry Number.

98168-21-9Relevant articles and documents

Enantioselective synthesis of allylic alcohols via an oxazaborolidinium ion catalyzed diels-alder/retro-diels-alder sequence

Jones, Simon,Valette, Damien

supporting information; experimental part, p. 5358 - 5361 (2010/01/19)

A triflimide-activated oxazaborolidine catalyst successfully promoted the asymmetric Diels-Alder reaction of 9-methylanthracene with methacrolein in high regio- and enantioselectivity. The cycloadduct obtained was subsequently used as a chiral template to

An amino alcohol ligand for highly enantioselective addition of organozinc reagents to aldehydes: Serendipity rules

Nugent, William A.

, p. 2133 - 2136 (2007/10/03)

(matrix presented) Amino alcohol 4 (or its enantiomer) is prepared in two simple steps. Commercial (1R,2S)-2-amino-1,2-diphenylethanol is dialkylated with bis(2-bromoethyl) ether. Subsequent hydrogenation over 5% Rh on alumina in the presence of morpholine unexpectedly stops at the hexahydro derivative 4. Amino alcohol 4 promotes the enantioselective addition of diethylzinc to aldehydes at room temperature in up to 99% enantiomeric excess.

Formal total synthesis of (+)-methynolide

Cossy, Janine,Bauer, David,Bellosta, Véronique

, p. 5909 - 5922 (2007/10/03)

A formal total synthesis of (+)-methynolide was achieved in 23 steps highlighted by a crotylboration, a ring-closing metathesis, a Sharpless kinetic resolution of an allylic alcohol and a Takai reaction.

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