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68223-20-1

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68223-20-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68223-20-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,2,2 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 68223-20:
(7*6)+(6*8)+(5*2)+(4*2)+(3*3)+(2*2)+(1*0)=121
121 % 10 = 1
So 68223-20-1 is a valid CAS Registry Number.

68223-20-1Relevant articles and documents

Water-Tolerant ortho-Acylation of Phenols

Dong, Shuang-Feng,Gao, Zhi-Yuan,He, Yu,Liu, Xu,Loh, Teck-Peng,Tian, Jie-Sheng,Wu, Peng

, p. 6594 - 6598 (2021/09/02)

A metal-free, water-tolerant, and one-pot process for ortho-acylation of phenols promoted by the iodine source/hydrogen peroxide system has been developed. This transformation undergoes ether formation, iodocyclization, C-C bond cleavage, and oxidative hydrolysis in a one-step manner, which is supported by control experiments.

Cu/Ag mediated peroxide-free synthesis of benzoylated naphthol derivatives

Prasanna Kumari, Subramaniyan,Suresh, Pavithira,Muthukumar, Vijayashree,Selva Ganesan, Subramaniapillai

, (2020/10/13)

A peroxide-free methodology was developed for the synthesis of benzoylated naphthol/phenol derivatives through oxidative deamination reaction performed under aerobic reaction conditions. A synergistic combination of Cu(OTf)2 and Ag2O was used to convert the aminonaphthols and aminophenols to the corresponding benzoylated derivatives. The definite role of atmospheric oxygen to assist the reaction was proved by performing the reaction in the argon atmosphere.

Rhodium-Catalyzed Directing-Group-Assisted Aldehydic C–H Arylations with Aryl Halides

Rao, Maddali L. N.,Ramakrishna, Boddu S.

, p. 5080 - 5093 (2017/09/20)

A rhodium-catalyzed general protocol for the directing-group-assisted arylation of aromatic aldehydic C–H bonds was developed. This method involves either hydroxy- or amino-group-directed aldehyde C–H arylation with various aryl halides. A broad synthetic scope for the preparation of 2-hydroxybenzophenones was established with electronically variant salicylaldehydes and aryl halides with chemo- and regioselective possibilities. The developed protocol was also applied in the synthesis of medicinally important 3-salicyloylpyridines in high yields.

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