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58972-42-2

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58972-42-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 58972-42-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,8,9,7 and 2 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 58972-42:
(7*5)+(6*8)+(5*9)+(4*7)+(3*2)+(2*4)+(1*2)=172
172 % 10 = 2
So 58972-42-2 is a valid CAS Registry Number.

58972-42-2Relevant articles and documents

Asymmetric Hydroesterification of Diarylmethyl Carbinols

Tian, Duanshuai,Xu, Ronghua,Zhu, Jinbin,Huang, Jianxun,Dong, Wei,Claverie, Jerome,Tang, Wenjun

supporting information, p. 6305 - 6309 (2021/02/09)

An efficient asymmetric hydroesterfication of diarylmethyl carbinols is developed for the first time with a Pd-WingPhos catalyst, resulting in a series of chiral 4-aryl-3,4-dihydrocoumarins in excellent enantioselectivities and good yields. The method features mild reaction conditions, a broad substrate scope, use of easily accessible starting materials, and low palladium loadings. A plausible stereochemical model is also proposed with the Pd-WingPhos catalyst. This method has enabled a 4-step asymmetric synthesis of (R)-tolterodine from readily available starting materials.

One-Step Synthesis of Substituted Benzofurans from ortho- Alkenylphenols via Palladium-Catalyzed C=H Functionalization

Yang, Dejun,Zhu, Yifei,Yang, Na,Jiang, Qiangqiang,Liu, Renhua

supporting information, p. 1731 - 1735 (2016/06/09)

A dehydrogenative oxygenation of C(sp2)=H bonds with intramolecular phenolic hydroxy groups has been developed, which provides a straightforward and concise access to structurally diversely benzofurans from ortho-alkenylphenols. The reaction is catalyzed by palladium on carbon (Pd/C) without any oxidants and sacrificing hydrogen acceptors.

Palladium(II)-catalyzed direct carboxylation of alkenyl C-H bonds with CO2

Sasano, Kota,Takaya, Jun,Iwasawa, Nobuharu

supporting information, p. 10954 - 10957 (2013/08/23)

Pd-catalyzed direct carboxylation of alkenyl C-H bonds with carbon dioxide was realized for the first time. Treatment of 2-hydroxystyrenes and a catalytic amount of Pd(OAc)2 with Cs2CO3 under atmospheric pressure of CO2 afforded corresponding coumarins in good yield. Furthermore, isolation of the key alkenylpalladium intermediate via C-H bond cleavage was achieved. The reaction was proposed to undergo reversible nucleophilic addition of the alkenylpalladium intermediate to CO2.

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