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41998-17-8

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41998-17-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 41998-17-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,9,9 and 8 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 41998-17:
(7*4)+(6*1)+(5*9)+(4*9)+(3*8)+(2*1)+(1*7)=148
148 % 10 = 8
So 41998-17-8 is a valid CAS Registry Number.

41998-17-8Relevant articles and documents

Conversion of esters to thioesters under mild conditions

Shi, Yijun,Liu, Xuejing,Cao, Han,Bie, Fusheng,Han, Ying,Yan, Peng,Szostak, Roman,Szostak, Michal,Liu, Chengwei

supporting information, p. 2991 - 2996 (2021/04/14)

We report conversion of esters to thioestersviaselective C-O bond cleavage/weak C-S bond formation under transition-metal-free conditions. The method is notable for a general and practical transition-metal-free system, broad substrate scope and excellent functional group tolerance. The strategy was successfully deployed in late-stage thioesterification, site-selective cross-coupling/thioesterification/decarbonylation and easy-to-handle gram scale thioesterification. Selectivity and computational studies were performed to gain insight into the formation of weak C-S bonds by C-O bond cleavage, which contrasts with the traditional trend of nucleophilic additions to carboxylic acid derivatives.

Transesterification of (hetero)aryl esters with phenols by an Earth-abundant metal catalyst

Chen, Jianxia,Namila,Bai, Chaolumen,Baiyin, Menghe,Agula, Bao,Bao, Yong-Sheng

, p. 25168 - 25176 (2018/07/29)

Readily available and inexpensive Earth-abundant alkali metal species are used as efficient catalysts for the transesterification of aryl or heteroaryl esters with phenols which is a challenging and underdeveloped transformation. The simple conditions and the use of heterogeneous alkali metal catalyst make this protocol very environmentally friendly and practical. This reaction fills in the missing part in transesterification reaction of phenols and provides an efficient approach to aryl esters, which are widely used in the synthetic and pharmaceutical industry.

Palladium-catalyzed alkoxycarbonylation of aryl halides with phenols employing formic acid as the CO source

Qi, Xinxin,Li, Chong-Liang,Jiang, Li-Bing,Zhang, Wan-Quan,Wu, Xiao-Feng

, p. 3099 - 3107 (2016/05/24)

An efficient palladium-catalyzed alkoxycarbonylation of aryl halides with phenols has been developed. Various aryl benzoates have been isolated in good to excellent yields with formic acid as the CO source. The reaction proceeds smoothly under mild conditions and good functional group tolerance was observed.

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