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67404-97-1

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67404-97-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67404-97-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,4,0 and 4 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 67404-97:
(7*6)+(6*7)+(5*4)+(4*0)+(3*4)+(2*9)+(1*7)=141
141 % 10 = 1
So 67404-97-1 is a valid CAS Registry Number.

67404-97-1Relevant articles and documents

Tandem Blaise/retro-Blaise reaction for the nitrile-mediated regioselective intermolecular addition of unstabilized zinc ester enolates (Reformatsky Reagents) to 1-alkynes and 1,3-enynes

Kim, Ju Hyun,Chun, Yu Sung,Lee, Sang-Gi

, p. 11483 - 11493 (2013/12/04)

We report the novel use of a nitrile as a mediator to achieve the regioselective intermolecular addition of unstabilized zinc ester enolates (Reformatsky reagents) to 1-alkynes and 1,3-enynes. This reaction is made possible by a reversible addition of enolates to a nitrile (Blaise reaction), generating a zinc aza-enolate that, unlike zinc ester enolates, can add intermolecularly to 1-alkynes and 1,3-enynes. Subsequent removal of the nitrile through a retro-Blaise reaction generates the targeted addition product. This method is combined with a Diels-Alder reaction and subsequent oxidative aromatization, providing a tandem one-pot de novo construction of α-arylated alkanoates from Reformatsky reagents.

A BREAKTHROUGH FOR THE PHOTOCHEMICAL ARYLATION IN THE 3-(PHENYLMETHYL)-2(5H)-FURANONE SYSTEM LEADING TO THE TETRAHYDROINDENOFURANONE SYSTEM

Muraoka, Osamu,Tanabe, Genzoh,Sano, Kyohko,Momose, Takefumi

, p. 1093 - 1096 (2007/10/02)

The photochemistry of the 'central methane'-substituted 3-benzyl-2(5H)-furanone system (1) is described.Despite its di-?-methane structure, photochemical arylation was found to predominate in place of the di-?-methane rearrangement, and gave substituted t

A Two-Step Preparation of α-Alkylidene γ-Lactones from γ-Lactones: A Synthesis of (+/-)-Ancepsenolide

Larson, Gerald L.,Perez, Rosa M. Betancourt de

, p. 5257 - 5260 (2007/10/02)

γ-Butyrolactone, γ-valerolactone, and the cis lactone of 2-hydroxycyclohexaneacetic acid have been C-silylated via their respective lithium enolates with diphenylmethylchlorosilane.The resulting α-silylated γ-lactones can be deprotonated and condensed with aldehydes and ketones to give α-alkylidene γ-lactones in moderate to excellent yield.The enolate of the α-diphenylmethylsilyl cis lactone of 2-hydroxycyclohexaneacetic acid condensed with 1-butanal but not with benzaldehyde or acetaldehyde.

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