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99802-88-7

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99802-88-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99802-88-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,0 and 2 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 99802-88:
(7*9)+(6*9)+(5*8)+(4*0)+(3*2)+(2*8)+(1*8)=187
187 % 10 = 7
So 99802-88-7 is a valid CAS Registry Number.

99802-88-7Relevant articles and documents

Visible light photoredox-catalyzed deoxygenation of alcohols

Rackl, Daniel,Kais, Viktor,Kreitmeier, Peter,Reiser, Oliver

, p. 2157 - 2165 (2015/01/09)

Carbon-oxygen single bonds are ubiquitous in natural products whereas efficient methods for their reductive defunctionalization are rare. In this work an environmentally benign protocol for the activation of carbon-oxygen single bonds of alcohols towards a reductive bond cleavage under visible light photocatalysis was developed. Alcohols were activated as 3,5-bis(trifluoromethyl)-substituted benzoates and irradiation with blue light in the presence of [Ir(ppy)2( dtb-bpy)](PF6 ) as visible light photocatalyst and Hünig's base as sacrificial electron donor in an acetonitrile/water mixture generally gave good to excellent yields of the desired defunctionalized compounds. Functional group tolerance is high but the protocol developed is limited to benzylic, α-carbonyl, and α-cyanoalcohols; with other alcohols a slow partial C-F bond reduction in the 3,5-bis(trifluoromethyl)benzoate moiety occurs.

Direct room-temperature lactonisation of alcohols and ethers onto amides: An "amide strategy" for synthesis

Valerio, Viviana,Petkova, Desislava,Madelaine, Claire,Maulide, Nuno

supporting information, p. 2606 - 2610 (2013/03/14)

Last-minute deal: A direct lactonisation of ethers and alcohols onto amides that proceeds at room temperature under mild conditions is reported (see scheme). This allows the effective saving of up to two unproductive, sequential deprotection operations in synthetic sequences. Mechanistic studies are described, and a new "amide strategy" that exploits the dual robustness/late-stage selective activation properties of this functional group is outlined. Copyright

Synthesis and Application of Imidazole Derivatives. Synthesis and Acyl Activation of 2-Acyl-1-methyl-1H-imidazoles

Ohta, Shunsaku,Hayakawa, Satoshi,Moriwaki, Hiroki,Harada, Suzumi,Okamoto, Masao

, p. 4916 - 4926 (2007/10/02)

2-Acyl-1-methyl-1H-imidazoles (3) were prepared in good yields by treating 1-acylpyrrolidines (5) with 2-lithio-1-methyl-1H-imidazole (2) at -78 deg C.The acyl group of 3 was very stable under various severe conditions, but 2-benzoylimidazole (3a) was gradually hydrolyzed by heating with 1.3 N NaOH to produce benzoic acid and 1-methyl-1H-imidazole.Acyl activation of 3 was performed by direct quaternization of 3 with iodomethane or dimethyl sulfate or more successfully by quaternization of the corresponding O-trimethylsilylated gem-cyanohydrin (11) with dimethyl sulfate.Keywords- acylimidazole; 2-acylimidazole; imidazolium salt; acyl group activation; acylation; C-C bond fission; protecting group; latent functionality

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