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1740-26-7

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1740-26-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1740-26-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,4 and 0 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1740-26:
(6*1)+(5*7)+(4*4)+(3*0)+(2*2)+(1*6)=67
67 % 10 = 7
So 1740-26-7 is a valid CAS Registry Number.

1740-26-7Downstream Products

1740-26-7Relevant articles and documents

One-Pot, Two-Step Metal and Acid-Free Synthesis of Trisubstituted Imidazole Derivatives via Oxidation of Internal Alkynes Using an Iodine/DMSO System

Naidoo, Shivani,Jeena, Vineet

, p. 1107 - 1113 (2019)

A one-pot, two-step, simple, efficient and eco-friendly oxidation of internal alkynes as a key step towards the synthesis of 2,4,5-trisubstituted imidazoles, using an inexpensive I2/DMSO system, has been reported. This metal and acid-free synthesis proceeded smoothly to furnish a variety of synthetically useful trisubstituted imidazoles in moderate to excellent yields. In an effort to demonstrate the potential future applications of this system, a double oxidation study was undertaken and the desired trisubstituted imidazoles obtained in good to moderate yields.

An eco-friendly, one pot synthesis of tri-substituted imidazoles in aqueous medium catalyzed by RGO supported Au nano-catalyst and computational studies

Biswas, Sudip,Das, Madhurima,Ghatak, Avishek,Sinha, Debopam

, (2021/07/09)

An eco-compatible, mild and operationally simple aqueous phase protocol for the synthesis of 2,4,5-trisubstituted imidazoles has been achieved with high substrate scope using supported Au nanoparticles. The catalyst can be recovered for the subsequent rea

An efficient multicomponent synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles catalyzed by a magnetic nanoparticle supported Lewis acidic deep eutectic solvent

Nguyen, Thanh Thi,Thi Le, Ngoc-Phuong,Nguyen, The Thai,Tran, Phuong Hoang

, p. 38148 - 38153 (2019/12/03)

A mild and highly efficient reaction for the synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles catalyzed by a magnetically supported Lewis acidic deep eutectic solvent on magnetic nanoparticles (LADES?MNP) has been developed via one-pot multicomponent processes under solvent-free sonication. These reactions have good to excellent yields, mild conditions, and work-up simplicity. This method represents a new method for the preparation of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles. More importantly, LADES?MNP can be easily recovered by magnetic separation and reused five times without significant loss of catalytic activity.

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