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69758-70-9

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69758-70-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 69758-70-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,7,5 and 8 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 69758-70:
(7*6)+(6*9)+(5*7)+(4*5)+(3*8)+(2*7)+(1*0)=189
189 % 10 = 9
So 69758-70-9 is a valid CAS Registry Number.

69758-70-9Relevant articles and documents

Hydrogen-bond-assisted transition-metal-free catalytic transformation of amides to esters

Huang, Changyu,Li, Jinpeng,Wang, Jiaquan,Zheng, Qingshu,Li, Zhenhua,Tu, Tao

, p. 66 - 71 (2020/11/18)

The amide C-N cleavage has drawn a broad interest in synthetic chemistry, biological process and pharmaceutical industry. Transition-metal, luxury ligand or excess base were always vital to the transformation. Here, we developed a transition-metal-free hydrogen-bond-assisted esterification of amides with only catalytic amount of base. The proposed crucial role of hydrogen bonding for assisting esterification was supported by control experiments, density functional theory (DFT) calculations and kinetic studies. Besides broad substrate scopes and excellent functional groups tolerance, this base-catalyzed protocol complements the conventional transition-metal-catalyzed esterification of amides and provides a new pathway to catalytic cleavage of amide C-N bonds for organic synthesis and pharmaceutical industry. [Figure not available: see fulltext.]

Organocatalytic Nitroaldol Reaction Associated with Deuterium-Labeling

Yamada, Tsuyoshi,Kuwata, Marina,Takakura, Ryoya,Monguchi, Yasunari,Sajiki, Hironao,Sawama, Yoshinari

supporting information, p. 637 - 641 (2017/12/13)

A deuterium-labeling reaction of nitroalkanes in deuterium oxide and the subsequent nitroaldol reaction have been accomplished under basic and organocatalytic conditions to provide the deuterium-labeled β-nitroalcohols in high yields and high deuterium contents. β-Deuterated β-nitroalcohols could be smoothly obtained from the reaction of nitroalkanes and various electrophiles using the easily-removal basic resin WA30. Furthermore, the asymmetric nitroaldol reaction using nitromethane and α-keto esters as electrophiles in the presence of a quinine-derived organocatalyst in deuterium oxide could provide the desired β-deuterated nitroalcohol derivatives with high enantioselectivities. (Figure presented.).

A highly efficient asymmetric Michael addition of anthrone to nitroalkenes with cinchona organocatalysts

Shi, Min,Lei, Zhi-Yu,Zhao, Mei-Xin,Shi, Jing-Wen

, p. 5743 - 5746 (2008/02/09)

A highly efficient asymmetric Michael addition of anthrone to nitroalkenes catalyzed by cinchona alkaloids was described. Up to 99% ee of the corresponding adduct was obtained.

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